Gordon0652

iTrader: (4)

I am in the prosces of looking and buying a stort block 402ci for my 2000 t/a, but i dont know much about heads, and i am going to keep this engine N/A and trying to make the most power possible and keep it street friendly some what... i was looking into a very good set of ported LS6 heads, or should i be looking at ETP heads bcause i see they have them for many diffrent combinations, like the C5R heads and others. Can i get any suggestions?
Thank you for your time!

http://www.etheads.com/00products.htm#

It would be amazing if i could get an engine that was built like this one even thoe its a 427ci!

http://www.samracing.com/99chevycamaross.html

http://www.samracing.com/99chevycamarossspecs.html

Gordon0652

iTrader: (4)

Anybody? Help would be much apreacheated because this is the only thing i am stuck on. I just need to figure this out.

JL ws-6

iTrader: (50)

I am running an ls2 402, and a set of the ET 240 heads are on it. Believe me when I say I am very happy with the choice I made. The motor is a race build, do a search of my screen name, I put a dyno sheet with some build spec's on the motor in the thread, it made 470 rwhp thru a th400 and a non lockup 5800 converter.

A streetable compression and cam would have no problem hitting 500+rwhp with a 402 and the same heads thru a stick tranny with the same setup.

WKMCD

iTrader: (2)

Here's an interesting build that made 500+RWHP and drives like stock.

https://ls1tech.com/forums/generation-iv-internal-engine/662314-l92-dynojet-numbers-plus-plan-b-c-d-e-f.html

Gordon0652

iTrader: (4)

Thank you, now this is a start!

Jpr5690

iTrader: (13)

Depends On Cam... If Its A Weekend Car With Radical Cam Id Think Ls6 Heads May Not Be Good Enough

Daily Driver With Med Sized Cam.. Ls6 Heads Will Probaly Give You Great Port Veloscity So Your Daily Driving Will Be Plesent

Also M6 Vs Auto Would Come Into Play Here.. Auto Cars Dont Nessiarly Need Flat Tq Curves Since They Slip Past The Low Rpms If Your A M6 Car And Using It For Something Other Than Drag Raceing You Dont Wanna Hog Out The Heads B\c Your Low End-midend #'s Will Suffer


Finally Common Guys Patrick And A Few Other Guys Are Makeing 500rwhp On 346 Motors (m6) When I Start My 402 Build Im Shoting For 500rwhp In A 4l60e 4000stall Car With A Dana 60... Hell Its Only 70 More Hp Than My Current Setup

Gordon0652

iTrader: (4)

I am going to be running a built A4 with a stall i am guessing around 3800.
Also being street friendly, i really dont care about the mpg because the car is driven about 5 miles a week. What else is there about being street friendly?

JL ws-6

iTrader: (50)

Honestly if the car is being driven that little, I'd go with a WAY more radical setup then even the $l60 will take. You may want to look at doing something like what I built, for 5 to 10 miles a week it would be o.k., probably a little less compression then I'm running os you could get away with pump gas, or maybe a 105 rather then the stuff I'm running, but I'd definately go bigger with the limited use you are looking at.

Probably a goof 4500 stall too, 5 miles a week is so little, that you won't ever really get tired of it I'm sure.

Gordon0652

iTrader: (4)

"I'd go with a WAY more radical setup" -JL ws-6

So what do you think i should be looking at? I honestly would love to have this built for me.

http://www.samracing.com/99chevycamaross.html

http://www.samracing.com/99chevycamarossspecs.html

DannoWS6

iTrader: (5)

402 w/ l92 heads 236-240 cam 11.1-5 CR, through a TH400 and 4500 stall. Done! And you can drive it on the street easy enough and run high 10's full weight.

walker94z28

I agree, I have been close. 11.13 NA, untuned and with a LS6 with stock injectors and stock fuel pump.....

Gordon0652

iTrader: (4)

ok, after doing some research, which is my friend i do like the 402, and maybe a 408 idea, but is there anyway to get more out of that, being N/A of course.

JL ws-6

iTrader: (50)

I don't think that you want to go as radical as the SAM car's motor... but more then what you were originally thinking would be a good idea IMO. I think a 402 will get you to your goals without a problem. If you can deal with running a race fuel and won't have a problem with emmissions, I'd run something like this, if you have a budget of say 10 grand:

alum 402
et 240 heads
12.5-1 compression
ported fast intake
42 lb inj.
1 7/8 header
cam in the 240-248 range, around 600 lift
coated diamond piston
eagle rotating assy
TH400 tranny, converter that stalls around 4000

Now if you have to get thru emmissions (no sniffer, but something that has to pass the plug in) and want to run on pump gas, a little smaller budget, I'd do something like this:

402
11.5 to 1 comp
l92 intake setup
l92 head, maybe have the exhaust side worked some
cam in the 235/245 range, these heads seem to like more of a split
1 7/8 header
regular diamond piston
same eagle rotating assy
get the best 4l60 tranny you can, or spring for a 4l80 swap, which would be a better idea imo, because anything that makes good pwr is gonna chew that 4l60 up like mad


If you are going to stay n/a which it sounds you will, I'd 100% do an alum motor, the weight savings of the block will make the car run better and you don't have any strenth concerns n/a at all with the alum block. Even if you were to say toss a 150 shot on it you'd still be fine with alum, hell probably fine with a 250 but now you're leaning on it hard and will most certainly find the weak spot.

walker94z28

Yeah, my 402 is 11.25.1 and it runs nicely on pumpgas. Nice job on the examples JL. And man, you got that thing flying bro.....

JL ws-6

iTrader: (50)

Thanks, it's getting there. I think I found something else that might help a little bit... we'll see next time I get it out, hoepfully next weekend, if not then on the 21st of this month at a rental day.

Gordon0652

iTrader: (4)

Now why wouldnt i get through emmissions on this engine?
Also can i go with the KOOKS 1 7/8 LT headers there Catted Y-pipe and the corsa exhaust?

LS1curious

run the 240 ET heads with a single plane or the LS7 heads with the Stock GM Ls7 intake or if you want a step in between a set of l92 heads with the l76 intake.

what RPM range would you like to be in ?

GPracer56

iTrader: (1)

Check the link, Golen's is one of the leading engine specialists in the northeast.

http://www.golenengineservice.com/html/ls.html

walker94z28

I have a few tricks for mine after the repairs of the lifters.

I have a stock intake, injectors and fuel pump in it now with no tune runing full weight.

When I am done it will have a 96mm typhoon intake with 42lb injectors and some Harlan Sharp rockers to replace the stock ones. Also I am getting a dyno tune, and doing major weight reduction and installing a cage.

I want mine to go 10.50 NA and about 9.5 on the can....

I think that will be a good start. My 402 is built strong, but I left off alot of suporting mods due to lack of funds. But now I have the funds and its time to have fun......

JL ws-6

iTrader: (50)

You could if there's no sniffer... but the thign is with a th400 swap there's alot of stuff you have to turn off, and if you roll in to an emmissions place running race gas well, they may question stuff.