11.0 @ 124 on straight 93oct and another blown header gasket

[jays05]

I went to my local track Lebanon Valley Dragway today for opening day test/tune. Just running the 93oct map trying to see if I can run 10s on pump gas.

First pass was 11.0 @ 124 with a 1.59 60', launching off the rev limiter

When I checked the logs I realized that I'd left the knock sensitivity up high (low numerically in the UTEC) and it was pulling timing on the FFS shifts. I made an adjustment and made another pass. That pass felt great but pulling off the track it became apparent that the header gasket blew out again. In the logs boost dropped to ~19psi from halfway thru 3rd onward.

Sucks, that second pass looks like it could have been a 10.9 if the gasket didn't blow out again.

Next time around I am going to try using copper header gaskets, and I'm going to have my local shop fabricate a bracket to hold the uppipe to the block, and maybe put a flex pipe in the downpipe right after the cutout.



Mods (the important ones anyways):

cp 100mm pistons, pauter rods
stock crank, ati super damper balancer, cosworth 10mm pump
cosworth 278/274 avcs cams, supertech +0.5mm valves, dual springs, retainers
gruppe-s UEL header v-banded to a custom 2.5" uppipe
custom fmic with 3" charge piping and a garrett 24x12x3.5" core
txs utec on top of openecu with an AWESOME Junior tune
dw1100s, perrin rails, aeromotive fpr, dual walbros
gt35r .82ar t31 2.5" outlet, tial 44mm ewg dumped
3" downpipe, QTP cutout, Borla Hush
act xtreme 6-puck (sprung) + oem flywheel
dss driveshaft and level2 rear axle bars
BFG DRs 225/45/17 on 17x8 Enkei RPF1s

No meth injection, e85, or race gas. Plain old 93 octane. It weighed 3055lbs with a half tank of gas and no driver.

I should have video of both passes "soon".

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[Steve.804]

Congrats! DR's or not, a 1.59 60ft is fantastic!

[godforbid67]

man, i dont even know what to say anymore. youll def get there bro. good luck

[juanmedina]

nice, for some reason when I read the title I read as "blow head gasket" , great man congrats

[TDagen]

Is that a 2.5inch outside diameter uppipe or inside diameter? I fabbed my own up pipe and I made it 2.20 inner Diameter to increase spool ect...How does the 2.5incher work for you? Congrats you will be running 10's on pump in no time...

[jays05]

Originally Posted by Steve.804

Congrats! DR's or not, a 1.59 60ft is fantastic!

Thanks! The car is easy to launch now. The 60-ft times on my last four passes were 1.57, 1.57, 1.59, 1.58 !!!

Originally Posted by TDagen

Is that a 2.5inch outside diameter uppipe or inside diameter? I fabbed my own up pipe and I made it 2.20 inner Diameter to increase spool ect...How does the 2.5incher work for you? Congrats you will be running 10's on pump in no time...

The uppipe is 2.5" ID and my gruppe-s UEL header (which is huge already) had the collector ported to open it up to 2.5" ID. It's hard to say what effect it had on lag since it was installed along with the header and gigantic fmic. But I guess it's working out well

[TDagen]

^Nice I wish mine was Vbanded to the header... Go get that 10 sec slip....

[Innovative Tuning]

At first I read that as "another blown head gasket". A blown header gasket is a much better problem to have. Good work for now and you'll get it figured out.

Generally those gaskets blow from the hardware loosening up and/or the flanges not mating well with each other. If you're sure the hardware didn't loosen up, see if the flanges are warped or not lining up nicely. You definitely don't need a special gasket if the pipes fit well.

[jays05]

Haha everybody at the track thought I said blown headgasket too.

I never used to have problems with header gaskets, it was always the uppipe gasket. We v-banded that and now it blows header gaskets instead. They were remflex gaskets and maybe that is some of the problem. I will check the torque on the bolts but they had already been retorqued after a couple hot/cold cycles.

[Junior2JZ]

Way to go Jay.. Funny after we got off the phone I took my friends car that runs similar to yours and blew the header gaskets on the street. All before tonight's festivities..

[Irishman]

Great job. Thats awesome, you definitely have 10's on pump with a clean run with no leaks.

[godforbid67]

Now the only question is, where do you go from here (after 10 sec pass on pump)???

[OVeRBOOSTn]

Originally Posted by Junior2JZ

Way to go Jay.. Funny after we got off the phone I took my friends car that runs similar to yours and blew the header gaskets on the street. All before tonight's festivities..

lol was this be4 or after our adventure lmfaooo..

and nice run jay cant wait to see that car run in person!

[john 1badSTI]

you can do it I know you can if I did it on 93/94 no meth weighing 3360 with me in it you can do it too.

[jays05]

Originally Posted by godforbid67

Now the only question is, where do you go from here (after 10 sec pass on pump)???

Priority now besides fixing the leak is a rollbar so I can have fun at the dragstrip and not get kicked out. I want 10s on 93oct and really ****in fast on c16, and I want to have fun with the car all summer. That's about it.

[spoolinsti05]

The copper ones from crucial are perfect. But make sure to re tq them and use copper gasket sealer. I never ever had another blown up pipe gasket after that. But I do see the imperfection in the ultimate racing up pipe flange I have.


Congrats on the times man.

[scOOtNsOOby]

Originally Posted by juanmedina

nice, for some reason when I read the title I read as "blow head gasket" , great man congrats

i read the same then i i read the post and it was header gasket lol

[moorebl]

i kept blowing that gasket when i had my perrin set up. just make sure you mate that uppipe to the header before you tighten anything else

[AlxSti]

very nice.. awesome 60ft.

[BuggeyEYED]

nice runs....i guess its better to blow the header gasket then to blow the header apart like i did a few weeks ago..lol (not really apart but cracked it straight through)

[madmax718]

Originally Posted by godforbid67

Now the only question is, where do you go from here (after 10 sec pass on pump)???

Fast and the Furious! NOS!! NOS!!!!

[GeneralTJI]

Any update on the videos? Watching your footage is always a good time...

[saab-on-the-cobb]

Originally Posted by jays05

Haha everybody at the track thought I said blown headgasket too...They were remflex gaskets and maybe that is some of the problem...

YEP.

They make great exhaust gaskets, but the pressure from your headers is FAR too much for the RemFlex-style gaskets. There are threads on this elsewhere.

Remflex is good for fising a leaky TBE, but I would never trust one on my headers.

GREAT RUNS, by the way!

SOTC

[GeneralTJI]

hey make great exhaust gaskets, but the pressure from your headers is FAR too much for the RemFlex-style gaskets. There are threads on this elsewhere

Yep.. great for NA or low pressure applications.

I blew a huge chunk of one out by using ignition cut FFS

[STimo]

impressive driving! Both those runs were basically perfect! Too bad that gasket let go, you would have had a 10 sec pass on pump for sure.. Very impressive!