floman

iTrader: (54)

Hey Guy's
Just picked up my new engine from LME in Houston,Tx on Friday afternoon. My car has been down since early May due to a timing chain & gear failure in the L92 setup that is in my sig. Really a freak thing that just happened with no warning, was able to salvage the complete shortblock and only real damage was 8 bent valves. Was lucky compared to how bad it could have been.

One of my friends bought the 6.2 from me for a good price, and that opened the door for me to be able to build a larger engine. My first thought was to build a 416" LS3 stroker. I purchased a pair of TFS GenX 255 LS3's from a member here on Tech, they had two previous owners but neither ever used them, so I got a good deal on them.

After some phone conversations with Bryan @ Late Model Engines I decided to bite the bullet and build a LSX based 427 and use the TFS 255's & the FAST 102/102mm setup from my previous setup.

Engine specs are:
GM LSX block
Callies Compstar 4.0" stroke crank
Callies Compstar 6.125" rods
ARP main & head stud kits
Wiesco K463x125 -2.8cc forged pistons/ 12.0 compression w/65cc chambers
Cometic .051" head gaskets
TFS GenX 255 LS3's milled to 65cc Chambers, no additional port work
Pacaloy 1208X dual springs w/titanium retainers
FAST LSXR 102mm/ FAST 102mm TB
52 lb injectors/ ZL1 Camaro
Cam Motion billet core Hyd Roller Camshaft
248*/264*@ .050" with .694"/ .681" lift on a 112 + 4 LSA
Comp Cams short travel Hyd Roller lifters
Manley 3/8" x .120" wall pushrods
Crower Stainless Shaft mounted 1.8 ratio rocker arms
Rollmaster double roller timing set
Melling 10295 ported oil pump
Moroso 21150 F-Body Aluminum oil pan
ATI F-body damper
Kooks 2" x 3.5" merge collector LTs

Did'nt really know what to expect for power, as always was hoping for more. But, I'm sure its gonna be fun for a street car and I can always add that big shot of juice when I feel the need.

They also made a couple of pulls with a Holley Hi-Ram intake w/90mm TB. The Hi-Ram made about 20 more peak HP, peaking @ 6800 rpm and carrying pretty flat until the 7000 rpm shutoff, but was down by 30 lb/ft tq across the entire range.

Here are the dyno charts and readouts for the FAST 102 intake, as a side note they used a 90mm DBW TB for the dyno runs since thay are set up for drive by wire. So, just wondering how much power is in running my 102 mm TB? In the print out you can see where there was a vacuum during a majority of the pull from 4600 rpm on up?




Here is the graph for the FAST 102mm intake & 90mm DBW TB


Here is a graph showing the difference between the FAST 102 & the Holley Hi-Ram. Both using the 90mm TB.

HCI2000SS

iTrader: (2)

Very nice! What type of vehicle is this going in?

jlrz28

iTrader: (7)

LME does great work! Great numbers! Should run pretty well!

floman

iTrader: (54)

Going in the 98 SS Camaro that's in my sig. Will be running it with the 4L85E tranny & FTI 3800 triple disc nitrous spec converter and 12 bolt rear with full spool and 3:73s. Kooks 2" x 3.5" merge collector LTs. Was running a 150hp shot on the previous setup, I'm sure this engine will be able to handle a lot more than that.

It should be fun for sure

floman

iTrader: (54)

They are great people to deal with. I am pretty pleased with the results, and I can't wait to get it in the car and see how it feels!

ScreaminRedZ

iTrader: (3)

That looks sharp, gonna make for a fun ride! Are you gonna throw it on the rollers when you get it installed? Curious what the difference will be.

floman

iTrader: (54)

Thanks! Yes, I plan to get the car tuned on a chassis dyno when I get the engine installed here in the next month or so. I had Geoff Skinner @ EPS " Engine Power Systems " do the tune on the previous setup and he did an excellent job. I hope to get him or Pat G. to do the tuning for me this time around.

I am excited to get it all together and see what it is capable of. The previous cammed & bolt-on L92 combo ran very good for what it was in this 3800 lb car. I am hoping for low 10's on motor and well down into 9s on a conservative shot of juice

ScreaminRedZ

iTrader: (3)

Good luck hitting your goals, looks like a solid build.

Tuskyz28

Great looking motor!! What's the compression on the 427?

Rise of the Phoenix

iTrader: (27)

Very nice. Sexy looking motor for sure.

floman

iTrader: (54)

Thanks
Compression is 12.1:1 and the dyno pulls were on 93 octane Chevron pump gas and 90mm TB because we did not have a 102mm drive by wire to bolt up. Hoping there are a few more ponies when I put my 102mm on in the car.

Thanks man, I appreciate the kind words. Has been a project for sure, just glad to be finally getting closer to seeing it come to life again.

Tuskyz28

Those valve covers are just pimping bro. Motor should put down 550 horses at the tire!

JRracing

iTrader: (35)

Very nice results. The motor looks pretty cool also.
My buddy has those valve covers in wrinkle black on his car. They are very nice.

floman

iTrader: (54)

You know, I looked around for some cool billet valve covers but they are outrageous for the LS engines. I ran across these Proform covers and they were reasonably priced I guess you could say. I just couldn't see paying $600.00-$800.00 for valve covers AND, I don't have to worry about polishing these all the time!

I like the valve covers a lot too, they match the LSX block pretty good too I'm ready to get it going and get to the track to see what it'll do

Dynospeed

iTrader: (3)

Do you have a dyno graph with the holley intake on it? Did they run the 90mm tb on the holley also?

floman

iTrader: (54)

Yeah, here is the only one I have that shows both intakes. They were both dyno'd using a 90mm drive by wire TB that LME had on hand since their new dyno is setup for DBW. The RED graph lines are the Holley Hi-Ram and the BLACK lines are the FAST 102mm intake.

The Holley Hi-ram is for the upper rpm range for sure. The FAST 102 kicks it but up to the 6400 rpm mark though!

I'm pretty sure the 90mm TB is not optimum for this setup. Hoping I will gain a few HP when I bolt my 102mm TB on it?

jlrz28

iTrader: (7)

Are you planning on doing a SD tune or using a MAF?

floman

iTrader: (54)

Well, you know I have been thinking about that a lot here lately. I do have HP Tuners but I am not really experienced enough to try doing my own tuning yet. I have played with it while doing my 4L85E swap and got the tranny working good so far, but have not played around with any engine tuning.

My previous setup with the L92 was running on a MAF tune done by Geoff Skinner @ EPS in Baton Rouge. That was with the same 102/102mm setup with a 85mm MAF.

I am afraid that the 85mm MAF is going to be a restriction on this engine combination. I like the idea of a MAF tune and wouldn't mind keeping one, but not sure this old 98 computer will be compatible with the newer bigger 100mm MAF's. I read somewhere that the 98 computer was not able to read the higher frequencies associated with the bigger MAF's? Speed Density may be the way I need to go and I just might have a big learning curve ahead of me.

I'm sure I will get either Geoff Skinner or possibly Pat G. to do the initial tune and get recommendations from them on which direction to go. I know I probably need to swap out to a newer computer, but I hate to go through all the BS associated with it. Guess that's one of the downfalls to the 98 cars, I have heard that you have to change out the gage cluster and fuel sending unit issues when putting in the newer computers?

Tuskyz28

I'm in for a idle clip when you put it in the car

jlrz28

iTrader: (7)

Yeah I am on smaller cubes than you but am tired of messing with all the plumbing from the lid, Maf and tb. I think I have some leaks and found my fast 102 has a crack. Being yours is a 98 that brings in more questions that I wasn't sure about also.