PowerShift408

iTrader: (44)

Well then... things to do:
-TFS 225s
-Vengeance ported Fast90
-1 7/8'' primary headers


I would do the U/D pulley again but I just don't like the idea of spinning the oil pump, power steering, and alternator slower.

slow trap

iTrader: (22)

you can still make big power with 1 3/4 headers. i made 517 through the 3" cutout with qtp 1 3/4 headers. i'm still debating on 1 7/8 headers,i know i'll pick up power on spray but i don't know how much i would pick up on motor only.

Jordan S.

iTrader: (17)

You got stock heads on a 408 with a 9in. Dyno's can vary and can be made to lie.

02NBMWS6

iTrader: (22)

dude, i made 432rwhp cam only. There is definitely something going wrong here. More compression, almost 70 more cubes, and a bigger cam equal my numbers?

02SOMWS6

iTrader: (6)

I would be disappointed if I were you. Before the Fast 90/90 my car put down 424 rwhp threw a 12 bolt with a heavy steel driveshaft and 4.11 gears. Then I switched to a Fast 90/90 ,4.30 gears and retuned and made 452rwhp . Still stock bottom end and ported 241 heads

1fastTransAm

iTrader: (6)

I still have my stock RearEnd and am over 500. But then again I am not racing it on a racetrack though either. A 9in with motive 3.90 gears are in the plans

Pwebbz28

iTrader: (31)

Ok then lets put a 9 inch and a dual disc clutch in your car. I got money says you would be under 400. The motor was also made for nitrous. the rings are gapped for a 300 shot. There is nothing wrong with the motor. It was built by Eric from HKE.

02NBMWS6

iTrader: (22)

well, actually i did put a 12 bolt, and a 9in in my car. It made 423 through the 12 bolt, and 419 through the 9in. Textralia, built driveshaft, viper output shaft, 4.30s and then 4.11s, the whole nine. How much money did you have saying under 400?

70 cubes more and 13 more hp with more cam? just saying, id feel that there was something wrong

Pwebbz28

iTrader: (31)

Thats still not a dual disc clutch. Thats a pretty damn efficient 9in. Tex clutch also has a fairly lightweight flywheel even for the billet one. Most people will tell you dynos mean squat. Car for car i wouldnt have a problem puttin my money on 408's car at the track.

sdbrown84

iTrader: (22)

Yeah the 241's are holding you wayyyy back. For budget get a set of ported LS6's and some oversized valves and re-dyno that car. If you don't gain at least 30 rwhp with that alone I would be surprised.

02NBMWS6

iTrader: (22)

no ****, but thats not the issue here
no ****, 70 more cubes, more compression, more cam, a better torque curve and more peak hp and tq? Doesnt take a genius

how much money did you have on the under 400 gesture? and do you have a dual disc clutch for me so i can show you it still makes over 400?

sorry for the hijack, im sure you have ALOT left in it with better heads

PowerShift408

iTrader: (44)

Hell I was only gonna spray 200 to it. That's good news to me.

But for anyone that thinks there is something wrong with the motor and or tune, there isn't. Compression and leakdown tests were fine, it's got new valve springs, new plugs, new wires, and the tune looks great to me, especially since it picked up 14 rwhp over the old SD tune and picked up power all across the graph, as well as picking up 22 lb. ft. of torque and picking up torque all the way across the graph. Now that I know the old numbers were with a 10 bolt, that really changes everything (as well as him having an underdrive pulley).

And concerning my numbers versus a stock cube cam only car, my heads are holding back a lot more power. Not saying your numbers aren't impressive (because they are), but if we both throw a set of heads on our motors, my motor is going to pick up substantially more.

02NBMWS6

iTrader: (22)

agreed 100%. Its just surprising to me that you didnt make more even with the same heads

camarokid94

iTrader: (2)

i agree i made 502rwhp with 1 3/4 hooker LTs as well. and a 9in. its apparent you need heads. your cam is awesome trust me and SLOW TRAP i think his is the same.

my advice MONEY PENDING
heads any LOL manditory try and get you CR up to 11.5 ish
fast 90/90 not manditory
advance your cam 4* if there isnt any already built in. if its strait up MANDITORY.

i think you need to take an honest look at your combo. take advice from those who have credit on what they are talkin about. and take the steps toward your goal that you can $$$ or time wise.

good luck to ya i hope you can get it figured out.

osuqsz06

iTrader: (2)

almost!!! well, is your exhaust a true dual?? if not you will be in the same boat as me w/ the y pipe choking you out. i lost 52 rwhp w/ a 3 inch ypipe and corsa on my stroker. you can get away w/ y on heads and cam cars but on strokers its a different story.

ArcticZ28

iTrader: (14)

I'm making 475/445 on a mustand dyno through 1 7/8 LT's, catted Y, and LM catback. You don't need TD's to make good power. It's all in the combo.

osuqsz06

iTrader: (2)

we are about the same and my combo is fine. yes, you can make great power but mote can be had w/ a true dual setup once you go w/ a stroker.

ArcticZ28

iTrader: (14)

Well yea, but this guy is wondering where his power is. I'm fairly confident it doesn't lie within the exhaust, but rather mismatched/lacking parts. I could be wrong, but that's where I would put my money.

powershift, what is your exhaust setup?

camarokid94

iTrader: (2)

TD are worth that much ???

osuqsz06

iTrader: (2)

i wouldnt say on all setups you should expect to see that high of a gain/loss. but the problems i had on mine was the exhaust big time!! on my heads and cam car the y was fine and yes you can make good power. but w/ my stroker and large cam (257/262) it really choked me out. this thing is really pushin the air.