Best Import vs Domestic race all yr

**Sleeper101** · 03-28-2009, 11:09 AM

Well Guys I am about to finish 2 very Big project cars and were gonna line them up straight out of the box and see who's got Bragging rights.

First up is My buddies 1995 Formula Transam, Has a built Lt1 383 Stroker, Forged Eagle crank, Eagle Rods, KB Forged Pistons .030 over, LT4 Hotcam kit, Fully Ported Stock heads with Bigger SS valves, Port matched LT1 Intake manifold, 58mm TB, 32lb injectors, Moroso Cold air intake, Full longtube Pacesetter headers, and a magnaflow exhaust. Backed with a set of 373 gears and a FUlly race built 4le60 Trans. He will also be pushing a 150shot.

2nd is My Built 240sx, Inline 6 Turbo charged on Propane Fuel. Has Forged internals. Bored .020 over, Cometic headgaskets, ARP bolts, 60mm Precision Turbo, 40mm Wasgate, Will be pushing around 25PSI, ( will Dyno to for 550+RWHP) Has a Cusco Exedy stg 4 race clutch, 5 speed trans, With Launch control. I am running 4.08 gears with a Full posi Rear. ( Car has been 7.40's on Stock turbo and is Now pushing 250+ More at the wheels)

Both cars Will be on Drag Radials, and We will be running 1/8th mile.

Should be a very close 6 second Race.

What do you guys think the results will be? These are 2 Very fast street cars. Were gonna do the Best of 5 races.

I have About 2 more weeks worth of work on Both then were heading off to the Dyno for tuning. Then to the Track. I will Update WIth all the results and Dyno Tuning Numbers.

**Y2KArcticSS** · 03-28-2009, 11:35 AM

Trans am will blow that rice piece of crap out of the water.

Just kidding, both nice builds, can't wait to see the race

**Sleeper101** · 03-28-2009, 12:24 PM

ha ha Thats wat he thought last yr also. That was until the 240 Half tracked him lol. But the Nitrous should make it interesting.

**Superluminal** · 03-28-2009, 09:31 PM

Originally Posted by Sleeper101

ha ha Thats wat he thought last yr also. That was until the 240 Half tracked him lol. But the Nitrous should make it interesting.

Did you hit single digit 1/4 in your 240 yet?

I'm still struggling getting into the 9s with my 4 cylinder 240SX. It's trapping at 140mph+, so it has the balls for 9s, just need to get everything dialed in.

**Sleeper101** · 03-29-2009, 05:36 AM

Nah I have not been to the track yet since the new setup. I will be going after I get it dialed in the 1/8th. I have been Non Stop on both of these cars since November.

What.are u trapping in the 1/8th?

**Superluminal** · 03-29-2009, 10:56 PM

Originally Posted by Sleeper101

Nah I have not been to the track yet since the new setup. I will be going after I get it dialed in the 1/8th. I have been Non Stop on both of these cars since November.

What.are u trapping in the 1/8th?

It's trapping 103mph in the 1/8. I seem to think this is where the problem area is, as the car pulls incredibly hard in 3rd and 4th, but something still seems amiss somewhere in the 1/8 mile. I feel this is why the car isn't getting into the 9s. I'm going to have to go over the tune again and do some suspension adjustments to see if it helps out. 140mph trap should be in the 9s range.

Regardless.... not bad for a 4 cylinder street car. Very few cars even come close to me in the top end, which is where the car is brutally fast.

**Sleeper101** · 03-30-2009, 01:44 AM

ya sounds like the 1/8th is were ur off. You need to be at least around 110.

What gears are you running?

Ur 60' needs to be in the 1.4 range.

But ur def knocking on the back door to the 9's. Its Just hard to get there.

**Superluminal** · 03-30-2009, 05:43 PM

Originally Posted by Sleeper101

ya sounds like the 1/8th is were ur off. You need to be at least around 110.

What gears are you running?

Ur 60' needs to be in the 1.4 range.

But ur def knocking on the back door to the 9's. Its Just hard to get there.

I'll get there the next time I run at the track, unless I have a catastrophe.

**Sleeper101** · 03-31-2009, 04:25 AM

Well if I dont Hit at least 9.60's this yr im gonna pull the Rb out and sell it. Then Ill build a 400sbc with a single 101mm turbo. Then will see who's boss lol!!!

**NickNuggetZ28** · 03-31-2009, 04:34 AM

any idea what the trans am will run?

**Sleeper101** · 03-31-2009, 05:45 AM

We ran it a few times last yr with the Stroker bottem end Only. Stock cam, heads, intake manifold, manifold exhaust all the way out, Stock gears, on street tires and ran 8.80's in the 1/8th. But we have not ran the new setup yet. I think With out Nitrous it should push 7.50's and with Nitrous 6.50's

**Superluminal** · 03-31-2009, 03:44 PM

Originally Posted by Sleeper101

Well if I dont Hit at least 9.60's this yr im gonna pull the Rb out and sell it. Then Ill build a 400sbc with a single 101mm turbo. Then will see who's boss lol!!!

I'm thinking of taking it out this Thursday. Wish me luck and a 9 second time slip.

**big hammer** · 03-31-2009, 03:51 PM

Originally Posted by Sleeper101

Well if I dont Hit at least 9.60's this yr im gonna pull the Rb out and sell it. Then Ill build a 400sbc with a single 101mm turbo. Then will see who's boss lol!!!

love those 400 sbc's!

**Sleeper101** · 03-31-2009, 04:39 PM

Originally Posted by Superluminal

I'm thinking of taking it out this Thursday. Wish me luck and a 9 second time slip.

Better Post it up

Good luck man!! You got any video's of ur ride in action?

**Superluminal** · 04-03-2009, 10:57 PM

Originally Posted by Sleeper101

Better Post it up

Good luck man!! You got any video's of ur ride in action?

No 9 seconds time slip. I fiddled with the suspension a bit, got one new best run in of a 10.18@140. Not much different than my previous best. The next pass I lowered the psi on the slicks more, softened the suspension all the way up in the rear, and raised the 2 step. The car launched harder then I've ever felt before, hit 2nd gear...... boom..... broke an axle and possibly the input shaft bearing. I did bring a spare set of old axles for backup, but I decided not to run the car again since I had to drive it back home. Also the transmission is a bit noisy now after the axle break, I'm going to pull it when I have time to see how bad the input shaft bearing took a beating. It shifts kind of rough now and whines.

Oh well, no biggy I guess, SR transmissions are decently cheap, and it held 500+whp and numerous track passes, so it exceeded my expectations. I'm going to looking into some beefier axles, as I don't want to be cut short on track day due to stock axles. Then I'm probably going to browse one of the local shops or forums for another SR transmission.... or maybe I should look into an auto setup..... hrmmmm.

So for now, the SR 240 is parked for inspection/repairs/upgrades. I guess it's time to bring the LS1 240 out for some thrashing.

**Sleeper101** · 04-04-2009, 10:44 AM

Originally Posted by Superluminal

No 9 seconds time slip. I fiddled with the suspension a bit, got one new best run in of a 10.18@140. Not much different than my previous best. The next pass I lowered the psi on the slicks more, softened the suspension all the way up in the rear, and raised the 2 step. The car launched harder then I've ever felt before, hit 2nd gear...... boom..... broke an axle and possibly the input shaft bearing. I did bring a spare set of old axles for backup, but I decided not to run the car again since I had to drive it back home. Also the transmission is a bit noisy now after the axle break, I'm going to pull it when I have time to see how bad the input shaft bearing took a beating. It shifts kind of rough now and whines.

Oh well, no biggy I guess, SR transmissions are decently cheap, and it held 500+whp and numerous track passes, so it exceeded my expectations. I'm going to looking into some beefier axles, as I don't want to be cut short on track day due to stock axles. Then I'm probably going to browse one of the local shops or forums for another SR transmission.... or maybe I should look into an auto setup..... hrmmmm.

So for now, the SR 240 is parked for inspection/repairs/upgrades. I guess it's time to bring the LS1 240 out for some thrashing.

Dang that sucks about breaking. I have had the same problems too. I was told to look at the rb20 skyline rear end. They are a direct bolt in with a 4.36 gear.

What kind of boost are you gettin at the line off the 2step?

**Superluminal** · 04-04-2009, 03:31 PM

Originally Posted by Sleeper101

Dang that sucks about breaking. I have had the same problems too. I was told to look at the rb20 skyline rear end. They are a direct bolt in with a 4.36 gear.

What kind of boost are you gettin at the line off the 2step?

The rear end is fine. I just broke the axle and possibly the transmission.

4.36 gear is way to short of a final drive, for me anyway.

On the run in which I broke I think I was between 12-14psi on the 2 step. Can't be sure, I wasn't looking at the boost gauge.

**Sleeper101** · 04-06-2009, 12:43 AM

That rb20 skyline rear end comes with axles that are extremely strong. If you buy axles for the r200 ur looking at 1200$+ There really expensive. Thats why Im going with that skyline rear end for around 300$

**Superluminal** · 04-06-2009, 08:56 AM

Originally Posted by Sleeper101

That rb20 skyline rear end comes with axles that are extremely strong. If you buy axles for the r200 ur looking at 1200$+ There really expensive. Thats why Im going with that skyline rear end for around 300$

Does the RB20 rear end come with a final drive that's sub 4.00? Because anything in the 4.00 range is a bit too short, and I'll have to shift to 5th at the end of the track which will kill my time.

**Sleeper101** · 04-07-2009, 01:49 AM

I really dont think The rb20 one does. But I know One of the skyline rear ends comes with a 3 something ratio. I dont remember the exact number. But I have looked into axles and rear swaps. I figured it out to be way cheaper to swap the entire unit than to Just buy axles. I was told when using the skyline rear end I could still use my 4lug hubs which is what I wanted so I dont loose my wheel combo. See idk what the sr ratio is in the trans, But with a 4.36 final on my Rb trans I pretty sure Ill be close to 7400rpm 4th gear 1/4 mile which is perfect considering I shift at 7500.