Dynamometer Results & Comparisons - Dyno Results -RPM-Motors Small Bore LS7 heads on a 4.005 Bore - C5Z06

TSP 402 short block 11.1:1
Eagle Crank/Rods/Diamond -15cc pistons/ARP everything
RPM small bore CNC LS7 heads. 60cc
RPM Ported LS7 Intake/ 96mm NW Throttle body
236-248 .648/651 114lsa
ARH 1 7/8 headers no cats.
powerbond ud pulley
diamond stage 2 clutch/ Light flywheel
ls7 rail/injectors
ls7 rockers trunion upgrade
Halltech air intake
Evans Water pump

This is our first test on the 4.00 bore - clearly, we can cam this up some if we want to. In the meantime it drives beautifully, idles like a champ and has a great torque curve.

http://i74.photobucket.com/albums/i254/H8LAPD/dans-1.png


First Warm Startup:

http://www.youtube.com/watch?v=2E56wd-plPQ&feature=player_embedded

Dyno Run:

http://www.youtube.com/watch?v=9efkY8oealQ&feature=player_embedded

Old Motor Out:

http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc7/402025_365842586764846_100000173229773_1770281_163 2686584_n.jpg

New Shortblock:

http://a3.sphotos.ak.fbcdn.net/hphotos-ak-ash4/407817_365843443431427_100000173229773_1770284_127 6883977_n.jpg

http://sphotos.xx.fbcdn.net/hphotos-snc7/399754_365843906764714_100000173229773_1770289_159 7303136_n.jpg

New Small Bore LS7 Heads:

http://a5.sphotos.ak.fbcdn.net/hphotos-ak-snc7/396170_365844083431363_100000173229773_1770291_361 361542_n.jpg

http://sphotos.xx.fbcdn.net/hphotos-ash4/401337_365844150098023_100000173229773_1770292_103 0789354_n.jpg

http://a4.sphotos.ak.fbcdn.net/hphotos-ak-snc7/405838_365844236764681_100000173229773_1770294_207 6002537_n.jpg

http://sphotos.xx.fbcdn.net/hphotos-snc7/398680_365844286764676_100000173229773_1770295_145 7652919_n.jpg

RPM Ported LS7 Manifold:

http://a5.sphotos.ak.fbcdn.net/hphotos-ak-ash4/395010_365845623431209_100000173229773_1770300_946 913161_n.jpg

If you bumped this motor to 11.7:1 it would have been kissing 550/500. Also this cam is very mild and we may end up putting something larger in and see what she does.

These heads are a amazing piece of work and a great option for us 4.0 bore and up guys.

This is the car:

http://sphotos.xx.fbcdn.net/hphotos-snc6/184974_207240639291709_100000173229773_964382_2201 773_n.jpg

http://a5.sphotos.ak.fbcdn.net/hphotos-ak-snc6/183505_207240482625058_100000173229773_964377_6443 616_n.jpg

http://a1.sphotos.ak.fbcdn.net/hphotos-ak-ash4/150503_178128688869571_100000173229773_706282_5156 593_n.jpg

Will these work with on a 378ci with a 4.08 bore? Or no?

Great results either way!

I you were to run these on say an ls3 bore they would be slightly different then these which are for the LS2. Should have no problem running these on that bore. They are designed for a 4.0 bore or larger.

I you were to run these on say an ls3 bore they would be slightly different then these which are for the LS2. Should have no problem running these on that bore. They are designed for a 4.0 bore or larger.

I am curious about flow numbers for the heads ... were they bench tested. I would like to compare them to my TF215's. I like the thought of a larger head/intake/TB combo, but I don't want to lose any torque. That is the best part of my motor.

You can see they make torque. They flowed 383cfm at .700 on my set of heads. Also my torque would have made 500 with a bit more compression. But due to the block having the -15cc dished piston we ended with just over 11:1 my fault for buying a used block. Was too good a deal to pass up. You will want to run a different cam with these heads then one cut for cathedral port heads.

These were some flow numbers from a prior set to mine.

Intake Flow (on 4.040 Bore)
.1 = 71
.2 = 164
.3 = 246
.4 = 301
.5 = 338
.6 = 364
.7 = 378

Exhaust Flow (on 4.040 Bore)
.1 = 56
.2 = 116
.3 = 178
.4 = 221
.5 = 240
.6 = 250
.7 = 256

I was going to run my old top end at first. But was excited to be the first to try these heads out. So i sold my topend to cover the cost of this setup. almost was a wash as you can get an ls7 intake on the cheap!

Old setup:
TEA TFS 220's
SPin Ported fast 92/96mm NW
YT rockers
svo 42's

I would like to know more about these heads like runner cc, valve sizes ETC

You can see they make torque. They flowed 383cfm at .700 on my set of heads. Also my torque would have made 500 with a bit more compression. But due to the block having the -15cc dished piston we ended with just over 11:1 my fault for buying a used block. Was too good a deal to pass up. You will want to run a different cam with these heads then one cut for cathedral port heads.

These were some flow numbers from a prior set to mine.

Intake Flow (on 4.040 Bore)
.1 = 71
.2 = 164
.3 = 246
.4 = 301
.5 = 338
.6 = 364
.7 = 378

Exhaust Flow (on 4.040 Bore)
.1 = 56
.2 = 116
.3 = 178
.4 = 221
.5 = 240
.6 = 250
.7 = 256

Very nice ... this is a similar setup I would like to try next year. I like my torque #'s, but i think I am leaving some horsepower on the table with my TFS CNC 215's / ported 90/90 setup. It will be track ready and I will shake it down soon. I still have suspension components yet to install to hook it, but we will see what. I am thinking coilovers should finish out the suspension.

By the way my TFS flow's are ...

0.100... 59.6... 68.3
0.200...121.9...139.8
0.300...186.7...218.5
0.400...231.4...270.9
0.500...254.2...304.3
0.550...260.2...314.8
0.600...266.1...321.8

Got the Car back today! Drives great and man does it Haul ass!

No mention of the stroke. Is this a 402ci?

Yes 402.

I have to say even with all the power this setup drives every bit as good as my 228-232 cam did in my 346. Amazing!

I actually got to look over a large bore casting beside a factory ls7 head. The oe ls7 head has a bulge behind the intake valve thats protrudes out. They designed these to where the coolant passage wouldn't stick out. With these, you have a much straighter path from the runner to the chamber that's actually smaller in size but flows considerably better. I look forward to many more great results with these heads. Great job RPM!

I actually got to look over a large bore casting beside a factory ls7 head. The oe ls7 head has a bulge behind the intake valve thats protrudes out. They designed these to where the coolant passage wouldn't stick out. With these, you have a much straighter path from the runner to the chamber that's actually smaller in size but flows considerably better. I look forward to many more great results with these heads. Great job RPM!

I think we will see some insane numbers from these heads in the future. Like I said build my combo to closer to 12-1 with a thumper cam and I bet you could see upwards of 560-570whp and 510-515tq on pump gas. Add a ported LS7 Fast 102/102 into the mix maybe closer to the magic 600whp mark who knows. Hell I'm a cam swap away from 550whp right now.

My combo is a modest combo on 91 pump and it made some serious strong numbers! But again I drive my car often and wanted a more mild mannered car. I got what I wanted as this drives as nice as my 228-232 combo did on my stock shortblock.

How much is the head package?

How much is the head package?


PM sent.

I was going to run my old top end at first. But was excited to be the first to try these heads out. So i sold my topend to cover the cost of this setup. almost was a wash as you can get an ls7 intake on the cheap!

Old setup:
TEA TFS 220's
SPin Ported fast 92/96mm NW
YT rockers
svo 42's

So what numbers did this combo make??? What were the increases from all of this work? I presume these mods were on a stock block LS6?

I think we will see some insane numbers from these heads in the future. Like I said build my combo to closer to 12-1 with a thumper cam and I bet you could see upwards of 560-570whp and 510-515tq on pump gas. Add a ported LS7 Fast 102/102 into the mix maybe closer to the magic 600whp mark who knows. Hell I'm a cam swap away from 550whp right now.

My combo is a modest combo on 91 pump and it made some serious strong numbers! But again I drive my car often and wanted a more mild mannered car. I got what I wanted as this drives as nice as my 228-232 combo did on my stock shortblock.

Nice peak horsepower, but I am waiting to see what it takes to bring the torque up too. The posts I have seen indicate the 102/102's dropping torque. Your 402 may make a good test bed for my future 402 mods. :nod:

So what numbers did this combo make??? What were the increases from all of this work? I presume these mods were on a stock block LS6?





Nice peak horsepower, but I am waiting to see what it takes to bring the torque up too. The posts I have seen indicate the 102/102's dropping torque. Your 402 may make a good test bed for my future 402 mods. :nod:


Yes those mods were on my stock block and went 450/412 on the same dyno.


Bring the torque up? I have a great torque curve. Especially when you look at my mild compression 11-1. I would imagine at 12-1 itwould pick ap 10-15 torque everywhere.

Yes those mods were on my stock block and went 450/412 on the same dyno.


Bring the torque up? I have a great torque curve. Especially when you look at my mild compression 11-1. I would imagine at 12-1 itwould pick ap 10-15 torque everywhere.

I didn't mean to imply that you were NOT making good torque. My meaning was that, in my case, before I run out and go to a 102/102/rectangular port setup, I would want to see a combo where the rwt was higher than your 488, since I am already at 497, but with 30 less rwhp. I would have to justify it to myself. Don't think I am to trying to down-play your accomplishment and if you read it that way, it was not my meaning .... damn forums. It is easy to read into something or hard to express a meaning on "paper".

Its all good. I believe you could do my exact combo with higher compression and go 550/505 easy. Especially on better then our crappy gas here. Also basically you could sell your combo to pay for this combo no problem. Not quite if you go with a Fast 102 though.

Its all good. I believe you could do my exact combo with higher compression and go 550/505 easy. Especially on better then our crappy gas here.

Now that would be something to think about next winter. Currently, I am running 11.6:1 with total timing of 24* and air fuel of 12.8:1. and we do have 93 octane readily available here.

Now that would be something to think about next winter. Currently, I am running 11.6:1 with total timing of 24* and air fuel of 12.8:1. and we do have 93 octane readily available here.

I would bet that if you did my exact combo with the RPM ported intake manifold these heads and my cam you could make those numbers deff on 93oct. At around 11.8:1

How much is the head package?

also curious on this.

my other post was deleted? Im blocked at work, what were the final numbers on this?

also curious on this.

my other post was deleted? Im blocked at work, what were the final numbers on this?

PM sent on the heads.

536/489 are the peak numbers.

PM sent on the heads.

536/489 are the peak numbers.

congrats on the numbers man:devil: bet that thing is alot of fun!

Yea just hit it full out today for the first time and damn! 4th pulls like 3rd did when I was head cam lol nutty.

Yea just hit it full out today for the first time and damn! 4th pulls like 3rd did when I was head cam lol nutty.

Do you work for RPM?

I am going to help them get there product out there eventually. But no not yet they just used my car to test these heads for the first time. So it was fun to be the test bed for something new in the LS world!

I am going to help them get there product out there eventually. But no not yet they just used my car to test these heads for the first time. So it was fun to be the test bed for something new in the LS world!

So you don't work there?

I am going to help them get there product out there eventually. But no not yet they just used my car to test these heads for the first time. So it was fun to be the test bed for something new in the LS world!


http://forums.corvetteforum.com/southern-california/3001667-please-welcome-our-new-sales-associate.html

Is this you^^^^^

http://forums.corvetteforum.com/southern-california/3001739-dyno-results-small-bore-ls7-heads-on-a-4-005-bore.html


This looks familiar ^^^^

So why lie?

So why lie?

I know MANY females who don't need any reason to lie. Maybe he is like them.

So why lie?

I am not getting paid by them right now so please dont post this in my thread. I didnt lie. I may be contracting with them in the future to help them get there stuff out there as i know them well now. Not to mention I said I would be helping them in the future so were is the lie? But right now I am just helping out my shop as a friend. Some people like to help other people. Also this is my car so I post up my build just like last time when i did my head cam setup last year. I'm just posting how well my setup worked with there heads. This is to show all you guys a new option that works well. What's the drama for? Take it out of my thread please. I figured you would all want to know about a new option to use in your setups.

So Charlie says you are a new employee....guess he's lying. Bottom line, you, Mr pinnichio will fit right in over there!!

Guess business gets bad when you scam people then you have to hire trolls to go forum flocking....and sell lies!

Hey, maybe Sybil will chime in...........

Cybil Shepard....??!! I love her

Cybil Shepard....??!! I love her

I'm sorry, "Sybil" from the movie.

I'm not even trying to sell anything. Its funny when you have people telling you your a liar when they don't know what's really going on. I posted results just like anyone else. I just got a screen name with them last week on Corvette forum damn. You guys are a joke. Charlie posted that thread so that i can answer questions on Corvette forum about my new setup for him and help answer any other questions they had. I will hopefully be an official employee and get payed that would be great! I would love the extra cash. Is there somewhere in this thread where I was trying to push products on people? The only time I gave any info is if someone asked for it. Damn you guys. I have been on this forum for years and would like to keep on without people calling me a liar for nothing. When I get paid by RPM then I will officially work for them work for them at least thats how I felt about being employed.

Zglass...thanks for sharing your results. 536/489 are awesome numbers in my book for a streetable 402. I'm sure you're traction limited now!

This thread used to be cool... WTF happened the past few days? :confused:

Anyways, awesome set-up. I'm guessing a minimum 4.030 bore, or will a standard 4.00 work?

Well I don't know what happened but I feel you it was a good thread before. I was just trying to give everyone a heads up on this new option. They can be used on a 4.0 bore. Mine is a 4.005 bore 402. Looks like it might be a CMS vs RPM thing but for what reason I have no Idea. I have talked with Ryne many times and I think he is a great dude. He has a bad ass reputation and has actaully helped me before. In fact I met him at a drag day last year cool guy. I'm just local to RPM and had good results with them which is why i was going to try and help them and possibly become an employee if it works out.

Either way, if the heads are priced accordingly, it frees up some money that you don't have to dump on a FAST, and can run an LS7 intake.

I've had a hard-on for a while now to cut the cowl on my car, ditch the wipers, and run the bread box (LSX-RT) but this seems like a much more viable option.

I thought you said something about having shrouding issues initially....? Is this fixed now with the casting, or is it going to be a case by case basis that has to be checked pending on bore size?

You have to run offset bushings with these heads to fix the shrouding issue. But its fairly simple.

Zglass...thanks for sharing your results. 536/489 are awesome numbers in my book for a streetable 402. I'm sure you're traction limited now!

I will be switching from My Falkin azenis to some Toyo tq drag radials soon. Yes traction is pretty limited right now lol.

Looks like it might be a CMS vs RPM thing but for what reason I .

What does CMS have to do you getting called out?......you're not the first to be in the position your in...

does Charlie still have orange hair?

It looked like CMS costumers were jumping on me thats why.I got called out on BS. I still don't officially work for them. I just help them on here a little. But this thread is my own because well its my Damn car isnt it! So why am I getting called out on trying to sell when I am talking about my own damn car. I'm not pushing parts just answering questions when they come. I also stated I want to work for them but dont yet. Never seen charlie with orange hair. That would be something to see lol.

You have to run offset bushings with these heads to fix the shrouding issue. But its fairly simple.

bushing? do you mean head dowels?
which valves are you using

great numbers!

I know MANY females who don't need any reason to lie. Maybe he is like them.

I know many females who like to create drama where there otherwise is none. No shortage of those here either...

Nice Numbers across the RPM range! I've been waiting a Long time for someone to do this besides MAST, Hopefully they are Less than 3k$ a set! Doubtfull but i still feel LS7 heads are Overpriced but the Best Head GM has ever produced for a Street Engine, Now the New COPO race camero's with 327cid LSX blocks are running the LS7 heads too
Are these 250+cc?

Good results with cam........Id love to switch my head.s to these with a fast intake ......hmmmm

very nice numbers!!

Nice setup!!

thats good power numbers for only a 236 int duration..