After 16 weeks backorder of AFR Heads its almost ready..

Just write shortly what rwhp can I expect from this setup.. Quick & short reply.. Thanks

All Forged 383cid

210cc AFR Heads (Competition Package) in: 288cfm @ .600 ex:220cfm @ .600 (with 1 7/8 pipe) 2.08 in valve, 1.60 ex valve

GM LT4 Intake Manifold (not ported) bored for 58mm TB and gasket matched to the heads. (I know I will lose lots of cfm because of bad intake )

237/245dur. 584/576lift 113lsa cam

255lph Walbro pump, 37lb injectors, 58mm TB, PCM tune etc...

D&D built viper specs T56 transmission
10 Bolt (yes yes I know)
MCLeod Street Twin (with aluminum flywheel)

 

Well you have some good flowing heads there and a healthy cam. I would guess 425-430 RWHP with lots of torque.

 

Id say about the same as above, but there would be more in it if you nailed the tune dead on...which takes time. And the torque should be up there also.

 

Between 410 and 430rwhp if all is well.

 

Ill guess between 350 and 450.

Whats the point in guessin... dyno that sumbitch!

 

Might want to give out your compression, to help on the estimates.

I think you might have trouble making 400rwhp, if you don't port the intake further. Stock lt4 intake ports are pretty small compared to the ports on the AFRs you'll be getting. You need to do more than just gasket matching.

 

CR: 11.0:1

When you guess the RWHP do not forget that I have T56 and 10 bolt rear.. (minimum drivetrain lose)

thanks

 

My guess is around 410 - 435 rwhp with good tq. Based on some of your other recent guesstimates, you're probably expecting 475-500 rwhp...not gonna happen..sorry.

 

Just curious...are you more interested in kick-*** dyno numbers, or how well it performs in the real world (where the comparison is more relevant)? With a T56, you know you're going to actually have to know how to drive it to post impressive times.

I'm not trying to be an ***...a dyno queen is just not impressive to me. The guys making 'only' 350rwhp and running 11.XX with 1.6X 60-foot times in an M6 is impressive - that takes skill and the right combination.

 

No why you said that? I expect 430 - 450 rwhp, but I will not be sad if I see ~420rwhp because I will use 200 wet shot nitrous.

 

Okay İn my country there is 2 tracks .. (drag race place) Here there are lots of 900-1000 rwhp lt1s, ls1s, ls2s but they drive their monsters on streets. Yeah I know you built your cars especially for drag races. I wish I could be there, but I'm not.
Any way 1/4 or 1/8 times are meaningless because I will probabily never get the car to the track.. I built my car for daily street use and race on highway (rolling).. For that reason I didn't upgrade my 10 bolt to 12 Bolt, I will not get the slicks
I don't want to be a dyno queen. I hope I could explained my situation..

sorry for bad spelling..

Deniz

 

Is there something less street-friendly about a 12-bolt?

 

No! I will definitely get it in a few months; this is about my budget.. I'm not ready to pay 2000$.. (Oh and 2000$ in USA 3000$ after shipping to my country

 

Belive me, I know what youre saying. What country?

 

415 Rwhp 390 Rwtq