Sharpe

iTrader: (7)

@ this thread.

AlabamaGuy

iTrader: (5)

You should know nothing productive happens in the LS4 section. I think this is the 4th mod visit to our section in recorded history.

DavidGXP

iTrader: (14)

After doing heads, cam, intake, headers, exhaust, CAI, LS6 CNC oil pump, C5-R chain, and Harland sharp roller rockers. I still want more I would drop 2,000 on a re-sleeve job in a heartbeat!

I think this motor is good for 115mph in the 1/4 as it sits now. With tires, I am certian I can hit 12.2's I just need a 1.8 60ft.
400whp?

Sadden

I've given up trying to make hug numbers with this combination. Everyone who does needs major $ for minimal gain.

Im doing DT headers , Exhaust (Full3"- Dual 2.5") , LS6 Intake , Mild Cam , (Mayyyyybe some spray just for ***** and giggles) , with a tep trans , with 3.69's. And calling it good. I love my ca , but i have come to terms with its inability to make big numbers. But lets be honest here guys , a mid to low 12"s Daily driver is nothing to sneeze at...

blkchevyz

115 trap speed seems pretty good to me. yeah your not going to get the 120ish that the ls fbody are getting but there is a little weight difference, a few ci, plus less drive train loss.

i was trapping 118 in my lt1 with similar mods but a big *** cam... i'd be pissed if a gp was right their with me lol

DavidGXP

iTrader: (14)

Car feels pretty good to me. Definitely a lot better then stock.
I am just sad because I feel like this car is tapped out now. A bigger Cam will be useless since I pass through the 1/4 at 5400 rpm. Bigger heads will kill port velocity, and intake options are very limited.
Weight reduction ruins the look and purpose of this car.. Nitrious is like steroids.


Hopefully, tuning will add more some more power. Bigger tb,and maf? Minimal... Gains

Brian396

iTrader: (3)

Before you did that I would look into a LS2 block & pistons with LS4 internals with a trans adapter. Hell Summit has a 6.0 .030 over for around $900. It's around 80lbs more?

neilownz

The trans adapter will make it wider and make you need more custom parts...

BlackImpSS

iTrader: (1)

Id try looking into other cams. It doesnt neccessarily have to be "bigger" but there may be a cam better suited for your new setup. I really don't see why you can't make 400 whp with a head/cam 5.3.

91parkave

iTrader: (4)

I dont know man i seriously think the tb and maf are seriius choke points on a 5.3 small bore aside i bet u break 400 with a ls2tb fully adapted on that ls6 intake manifold and the maf good for f/i but imo ls6 or any other 85 mm would work way better

DavidGXP

iTrader: (14)

I have thought about the adapter plate. I am not certian it will work for sure though. Would be an expensive test lol..

I don't want anyone to think for a second that I am unhappy with my car. I love the power and the look on peoples face when I pop the hood. I just want more!!

When I got done with my head swap, I took my G/F for a ride and tapped the car into 2nd at WOT and dam near side swipped the car next to me. Lesson learned LOL. She thinks I am obsessed and need theropy.

My best dragstrip battle to date is a 4.6 supercharged Mustang GT 07? He has an auto with gears, headers, exhaust drag radials, and gutted back half. He runs 12.45's all day long at 112.5-113. Guess he dyno's 450whp plus.
Seems like a lot of cars are over rated since this car puts down around 380 untuned. Last week he was trapping 115mph. He did some more weight reduction and added 100 octane.

Lots of Hondas running some pretty good times now days with crazy trap speeds. I would sure hate to race one of those guys on the freeway, since they would already be hooked up. I watched a couple of guys run mid 13's at 130mph!

DavidGXP

iTrader: (14)

Guess my next set of mods will be the TPiS 90mm snout, with a 88mm truck tb/MAF combined with a mild shot of water injection. Thinking I should have used a thinner head gasket for more compression. I am at 10.6 right now. 10.9-11.0 would be ideal

DavidGXP

iTrader: (14)

91parkave

iTrader: (4)

Those honda guys have that monster vtec/DOHC combo combined with light weight....jealous a little but hell **** em i could throw a civic in my trunk and drive home lol

THIS^^^^ exactly my plan i remember reading about out TB's being diffrent voltages but it should be easy with hp tuners to recalibrate those settings and get the car to "learn" a GTO or truck TB....once i get time to figure this **** out after i pass this FAA test ill start digging into that starting with the 85mm maf kind of thinking about a SD tune to be honest.

vroom_vroom

iTrader: (5)

building my Pontiac 400 to clean house on a lsx, if you like that ls feeling you gotta get behind a built pontiac, nothing quite like it.

DavidGXP

iTrader: (14)

Yes sir, the newer truck style TB's or any LS2 style will work with pigtail adapters and tuning. The required (larger) intake tubing should add some good power. The CAI/Stock coupler bend has got to be a restriction.
I won't know tell next season.

Plans for the winter:

• TPiS 90mm inlet
• LS2 TB
• LS2 MAF
• Matched tubing
• Custom rear coil overs w/adj shocks
• 26x11.5 MT ET streets
• ZZP front lower control arms
• Water meth
• Tuning

Brian396

iTrader: (3)

I posted this up before.
That was a newer truck tb.

DavidGXP

iTrader: (14)

Thanks Brain