Haans249

iTrader: (24)

Hello Everyone,
I'm going to be getting Katech's new "Budget" 427. I've been trying to think of what cam to use, because I'm going to be building this with a true "budget" mindset. I'm going to be using my Stage 3 heads (flow 327cfm at .650 lift) that have the PP Dual Spring kit installed. They're going to be going out to get freshened up and repaired thanks to Gunnar! (if you've seen my other thread) so that I will be using them on the new build. I'm also going to be port matching my FAST intake.
Just to give you guys a better idea of what I will be putting into the new engine, here is the following

Katech "Budget" 427ci engine (don't have details yet on this)
Stage 3 heads (Patriot Performance based) 61cc chambers (probably 60cc after clean-up)
FAST 90mm Intake/TB
Morel Lifters
Power bond 25% UD pulley
SVO 42lb injectors
Edelbrock Race Headers, 1 3/4 stepped to 1 7/8
I'll be using stock rockers as well.
I will also be tuning using my LS1 PCM w/ EFILive and LC-1 utilizing Katech's LS2 conversion adapters. MAF sensor will be eliminated via a Speed Density Tune.
Just for reference my previous combo with a EDC cam and all the above (228/236 .612/.590 114+2 LSA (112ICL)) made 441 hp and 400 trq untuned. After I tuned her I felt a ton more power so am guessing it hit somewhere between 455-465 hp and 410-420 trq, but an unfortunate valve failure ended its life early before i could get it back to the dyno.

I'm shooting for 550-600 rwhp on this combo with a "budget" in mind. I'm curious as to what sort of duration/lift some of you may recommend. I have a feeling quite a few people will start building these "budget" engines and am willing to be a guinea pig to test the final idea out! So, lets start!~

11 Bravo

iTrader: (3)

You will not come close to 600rwhp with Patroit heads lol. Be lucky if you get 550. I would ask Katech what cam to go with in their motor. They have more knowledge than anyone who will give you an answer here. I don't think it matters if you want a "budget" engine. All cams cost pretty much the same. I imagine most will recommend something in the 25*-26* duration range.

Haans249

iTrader: (24)

These aren't stock Patriot heads lol. They've been heavily ported. I don't see why 550 should be so tough with ~330 cfm flowing heads and big displacement. Of course, come the FAR future, I will most likely upgrade the heads

As far as what Katech or LG will recommend, I'm sure they'll work great and possibly get me to my goals, but I'd also like to learn in the process and they don't give out cam specs. And since the 427 cams they have designed are geared towards the LS7 top end, I don't think they would be as effective as a custom spec'd out cam, because combination is my goal here while keeping my budget in mind (not speaking about the cost of the cam, but rather the cost of new heads/intake/fuelrail system ect...)

11 Bravo

iTrader: (3)

If the heads are good then 550 is acheiveable. Did someone besides Patroit get their hands on them? Not to insult your intelligence, but there is no such thing at "stock Patroit heads". Either they ported them, or someone else did. Never seen Patroit heads make 550rwhp n/a. 600rwhp is a different level. You will have to start looking at ported LS7's for that.

Haans249

iTrader: (24)

You won't need to port Ls7 heads to get 600+ rwhp. LGM made 628rwhp on a stock LS7 engine. As far as my heads, they were further ported by ARE and made 550 on a solid roller 383 before...so I would assume they're good to 550 hp atleast. As far as "stock Patriot heads" I was referring to out-of-the-box heads...

Anyways, cams....

Nate_Taufer

iTrader: (1)

Well why not just have Ed custom grind you something? And who cares if it doesnt make 550 rwhp, as long as the curve is fat then you're doing alright. I expect you to make good power and torque though. Call ed curtis. Have him grind you something nice.

Nate

NVR4GET

iTrader: (3)

FYI LGM's ls7 is very high compression and a very agressive cam and from what I hear a little 75 shot. oops did I let that out.

Haans249

iTrader: (24)

True, I could have Ed custom grind me another cam, but I thought there might be interest in working through to a custom cam for a larger cubed motor, I thought it would be interesting...

Katech_Jason

iTrader: (19)

Wow. It doesnt even exist yet and you guys are already debating it.

Thanks for the support guys. We're working on it.

Layn_Low_247

iTrader: (1)

Haans249

iTrader: (24)

Well, from what I've learned thus far, HIGH STATIC COMPRESSION DOESN'T MEAN SQUAT. Its Dynamic Compression Ratio (DRC) that makes all the difference. And besides, how can you have higher SCR if all you did to your heads was some slight exhaust port work?!

As far as the 75 shot...I'd have a really hard time trusting that, unless it came from Lou's mouth.

Honestly, I think your reply is completely uncalled for, bashing a proven sponsor will get you no where. Go troll someone elses thread.

Nate_Taufer

iTrader: (1)

Slap yourself.

Nate

Bring the Noise

What about one of Lunati's voodoo LS cam's.

The 60511 is a 222/228 113lsa that is a good medium sized cam.
The 60512 is a 232/238 113lsa that is probably better for larger displacement motors.

I currently have the 60511 in a 05 GTO LS2 with Patriot Stage 2's.

UNFORTUNATELY I'm still waiting for my headers (edelbrock's that are suppose to be direct ship'd, purchased through SDPC... still haven't seen em and it's been a month... start'n to get ****'d).

Once all the parts get in I'ld do a finalization with HPtuners and then put her on a dyno... just wait'n on the headers.

Oh and that cam goes for under $300 at Summit (just an FYI).

Blown04Z06

what classifies as a budget 427? spending how much? i looked at doing a budget 427 and still came out to 12k-14k for the build, install and tune. i was going to be resusing my LS6 heads as the cores they would be CNC machined and hand finished $1800 complete flow was going to be in the 350-360 CFM @ .650 lift. buying used LGT's and fast 90 to save a little. reuse my stock rockers too. LME offers a 427ci SB for 6k. i was going to get a 1k credit for sending them my LS2 block that i paid $800.00 for new in the crate. $5199 for the SB alone. I opted to just have a local builder build a 403ci for $3150 using my block, eaqle crank, eagle h-beam rods, diamond pistons and rings, ARP hardware all the way thru the bottom end. i still have alot more to go and its looking like its going to run me another 6k with everything else that i am going to do, including intsall & tune. and that is on a budget, paying cash as i go.

Haans249

iTrader: (24)

Well, I already have all the above mentioned things for the build, all I need is the shortblock, and its looking like the pricing on Katechs will be VERY affordable, mostly because they'll be using all of their own manufactured components. Thats how its going to be a "Budget" engine.

John B

iTrader: (10)

Not true! Lou had the heads ported and he also ported the intake manifold.

Nate_Taufer

iTrader: (1)

You can use the new L-92 block bored .005" to 4.07" with a 4.1" stroke. 427 cid. This is the route I am taking for my build. Should be a few hundred more than a 402.

NAte

BurnOut

iTrader: (1)

LOL @ 75 shot

I have personally seen under the hood of that car since the work has been done, and believe me, there is no nitrous present. As for the compression, I don't know any specifics other than the car runs on pump gas... so it can't be TOO much higher than stock.

Stang's Bane

iTrader: (22)

If I remember correctly, the exhaust side only was ported on the heads and the compression was 11.1: 1. He just barely shaved the heads.

383ss

iTrader: (14)

I agree, why don't you just have EDC or Katech do a cam??? no way are you going to get a better recommendation on here.

and who cares what .650 flow is?? that means jack squat.