WizeAss

iTrader: (5)

Ran 7.4X at the track tonight.... lost 2mph from my previous best but went from a 7.67 (was running front runners at the time) down to the 7.4x with the smaller cam. My nitrous converter is too tight for motor.

60ft was 1.72 and the mph was 93 in the 8th with 28tall 17inch drag radials and 275/17's up front . It runs out of steam up top but has more down low on the motor. Feels faster on the street. This is with a non-SD tune.

I am thinking that with intake work I can gain another 20-40rwhp and when the new converter and kit goes on it should be a cake walk to go 5.9X or 6.2X in the 8th.

Damn Art Carr converter only hits 3300-3400 on motor! Tight like frog vagina.

I know a fella that took the same converter out and went to a 4200 Neil Chance Nitrous Converter and went from a 7.8 to a 7.2.... so running 6.8-6.9 on motor would be pretty cool!

silverbeast

iTrader: (16)

Hmmm, something seems off. I would think your car would be faster even though it is set up for gas. Good luck on your quest for the 5's.

Klive

iTrader: (4)

built for nitrous or not... thats SAD....

Howie Felterbush

iTrader: (1)

I have to agree with this statement for sure!!!!

Heavy wheels don't help but dude 93 mph traps??? thats what cam only automatics run!

97 mph in a 3400lb car = exactly 400rwhp at the tire and it was a nitrous stall that would only foot brake 1600!

The tune could use a lot work,,,the car is struggling throughout the rpms...tight converter or not. Too bad you couldnt get lined up with the Yellow Bullet. We would have sucked the paint off that black turd!

That intake you can't do much with really. gasket match and blend since its already quite large in the plenum area. a 40rwhp gain....not gonna happen.

WizeAss

iTrader: (5)

The car ran 95mph with less power and front runners?

I believe my car is around 4050 or more with me in it.

as far as the times---> I ran the car 4 times and everytime it did 1.7X 60ft..... this is why the ET sucks! Either it is the converter or the weight. Cant be the motor, as a 346 that is cam only makes less RWTQ and RWHP. So..... it is the weight or converter. The tune is fine.

Come on "Howie" ..... you have driven the car. And you know how freaking easy a WOT tune is. One table and one A/F target.... it isnt as complicated as street or driveability tuning

tektrans

iTrader: (23)

That's a heavy ride at 4000lbs. I don't think I've even ever heard of anyone racing an f body at that weight.
If it is really that heavy then the et/mph isn't bad at all.
Just to give you some hope, my best N/A 1/8 with my old 408 nitrous motor
was 6.4@104.8
BUT-that was at 3400lbs, 4:10's and a Neal Chance 8" vert.

GueSS Who

Damn that is not all that good. I have a 412ci that runs 6.3 with a nitrous converter. Shed some weight bitch.

Ego Killer

iTrader: (147)

what size converter do you run? reason I ask is because I'm blowing through my TCI 4000 on spray

just for the record my 3800 tank 408 TransAm went 6.82@100 NA

JonCR96Z

iTrader: (33)

Maybe be one reason they call it a nitrous converter. Regardless on a 408, a 3300-3400 stall shouldn't be too bad. I mean people cut similar 60s with bolt on cars and similar size stalls.

Having personally seen the difference between a ported and nonported GMPP intake, I would say that you'll definitely make more power. That casting is rough as ****, but I'd bet it'll be more like 10rwhp max. A new stall may help you alot but don't get your hopes up.

Was this a combo similar to yours. If so, I hope you bought yours before you saw those results.

I don't think so. Though you do look heavy in your avatar, I doubt you weigh 400+ lbs. If you carry cinder blocks around in your car you should take them out at the track. Please explain why its so heavy.

What did yours make? Who did the tune? And what are your cam specs?

WizeAss

iTrader: (5)

Sean did the tune, the car weights 3780-3840 or so iirc. I am 250 give or take last I checked. I bought the converter 3 days before he told me it was junk. And his car was similiar but with a 348 and TH350 and maybe 400lbs lighter. Cam specs are not public.... it is a grind by Rick at Synergy. around 23X/23X .61X/.60X on a 114 +4 (ILC 110) ---IIRC---. The other issue is I have 270cc intake ports..... heads flow too much for NA. I am hoping it will love the giggle gas.

WizeAss

iTrader: (5)

Well optimized SOLID ROLLER vs my heap = Apples vs Oranges

Howie Felterbush

iTrader: (1)

but you're setup could have been well optimized had you kept your mouth shut and stayed off the internet.....

Navy David SS

iTrader: (13)

WizeAss. You build for motor only, nitrous, or FI. To try to compare what nitrous engine is get you nothing. Your converter for nitrous maybe fine, but is way off for engine only. You need to dedicate either motor only or nitrous. 4050lbs? Good god man. At least take the 3 drunk buddies out of the hatch. 5's in the 1/8 is a lot harder than you think. What safety gear do you have? 5's in the 1/8 is low 9's. Good luck

David

WizeAss

iTrader: (5)

my **** would have been well optimized if I had gone to a different shop the first time and/or spent more funds.

I didnt pick the converter. Live and learn.

Klive

iTrader: (4)

I seriously doubt that car is that heavy for one, second, who is Sean? is this tuner so amazing that we should all know who he is just from his first name?

WizeAss

iTrader: (5)

I know the car weighed in with me in it at 3850 before the iron block, 6pt, TH400, 28 tall tires, TT2 wheels, heavier driveshaft and the Moser 9 inch rear end.

tektrans

iTrader: (23)

My 8" vert stalls around 4400. It's an N/A vert.

Caveman

iTrader: (2)

Your car is probably closer to 4100lbs, that thing is way too heavy! The tight conv and massive weight has to be where the MPH is. Deffinately need some Bogart or Alumistar wheels and do front and rear bumper delete mod.

1QuickT-A

iTrader: (12)

Hell my nitrous 408 runs like **** on the motor too.. Its got a nitrous grind cam, tight nitrous converter, 3.50 gear, 28" tire, and probably weighs around 3400-3500 with me in it.. With only 25* of timing and shifting around 6600 (low) it ran 7.00's @ 102mph and 10.90's @ 125 with a shitty 1.61 short time off the foot brake. No dyno time and a 45 minute street tune..

With a 100 shot it went 6.40's in the 1/8th and 10.00's in the 1/4 the first time to the track.. No dyno time, no nitrous tuning AT ALL.. 135mph trap and 1.43 short time spinning slightly.. Still short shifting and still at 25* of timing. Hell that was the first time I had even been to the 1/4 with the car and only the 3rd time in it period..

I feel this go around with a good solid tune it would go 6.70's off the trans brake with a N/A tune up. I also feel like with a good nitrous tune on the dyno that it will go 9.80s on the same 100 shot and I can live with that..