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9 Second 1/4 mile runs this weekend with the Twin Engine GTP !



TwinV6GTP said:
ZZP's record will be difficult to beat with the current mindset (stock parts everywhere).
Their car was a true full out drag car, extremely light, ultra high RPM 3.8 high boost etc...
Beautiful build with a huge budget.

With 20K in parts plus our time, I think we can beat that time. And if we succeed, it will be on 1/3 of the budget.
Click to expand...

At your current weight, and ~1000whp (give or take a few), you would only need like another 300+ whp total to get past Matt... which
in all honesty, won't be that hard for ya. Only limiting factor will be transmission holding ya back, like the converter slip I was getting.
Where more boost = no gains. You are to the point now, you have enough power/oompf to over come weight, so now its just to the point of
getting more power to the ground reliably, and knocking time off like crazy.
 
jdredd said:
At your current weight, and ~1000whp (give or take a few), you would only need like another 300+ whp total to get past Matt... which
in all honesty, won't be that hard for ya. Only limiting factor will be transmission holding ya back, like the converter slip I was getting.
Where more boost = no gains. You are to the point now, you have enough power/oompf to over come weight, so now its just to the point of
getting more power to the ground reliably, and knocking time off like crazy.
Click to expand...

My biggest hurdle right now, is the shift time on the stock transmission. They shift well for a stock trans but I lose a lot of time. I can feel the slowdown when each trans shifts (they shift at different times). I lose a lot of time a little before the 1/8.

I feel like having trans that shift hard and firm, would net me 2 tenths right there. I also need a 1.3 60 foot. The hurdle there is my 2nd gear starts in the rear engine AND my weight. Although I have 2 engines, the front one doesn't grip much.

After analyzing the full res version of my runs in slow motion you can see the front end light up off the line. Even the rear lights up but not as much. That's in part why I hurt the transmission as the front end unloads, the rear end takes the load.

I have to use progressive boost in front to prevent excessive wheel spin. I feel like that can drop my 60 foot my 1 tenth and ET by 1 1/2 tenth.
If I had a firm shifting trans I'd launch in 1st gear and that would help my 60 foot a lot.

Unfortunately I run into 2 other problems for a record breaking run. The tracks I go to, typically do not have as much traction as some of the better tracks in the US.
That is a known fact.
For example this weekend, the 7.6 ET turbo V8s ran 8.3-8.4. Lots of wheelspin.
They go in the states and consistenly run 7.7 or lower.

That said this track sometimes has a high level of grip but it has to be a special event and then they use the expensive glue. Those events usually mean it's very hard to make even 2 passes in the same day. So no place for mistake or practice runs.

Ultimately, my weight is a big problem. 4400 lbs 2 engines. Matt's car probably weighed 2200-2400lbs MAX but had over 1000WHP. Even as a FWD he had 1.3 60 foots. That is impossible to do on our tracks unless again there is a national event or the kid of the owner of the track is going for a record run in his car (he has one of the quickest 4 banger in the world)

WHP per lbs Matt's car is much higher and it shows with the very high MPH up top.

This event I popped with the windows off to get some fresh air in the back but the aerodynamic drag is huge and reflected in my low MPH.
It will take two built engines with over 700whp each. A great track and 1st gear starts with hard shifting transmissions. to get in the 8s at all.

With the current stock engine stock trans set up, my estimation for a perfect pass maxed out is low 9s. And that will take a hell of a run. Unless I can lose 400lbs +
 
TwinV6GTP said:
My biggest hurdle right now, is the shift time on the stock transmission. They shift well for a stock trans but I lose a lot of time. I can feel the slowdown when each trans shifts (they shift at different times). I lose a lot of time a little before the 1/8.

I feel like having trans that shift hard and firm, would net me 2 tenths right there. I also need a 1.3 60 foot. The hurdle there is my 2nd gear starts in the rear engine AND my weight. Although I have 2 engines, the front one doesn't grip much.

After analyzing the full res version of my runs in slow motion you can see the front end light up off the line. Even the rear lights up but not as much. That's in part why I hurt the transmission as the front end unloads, the rear end takes the load.

I have to use progressive boost in front to prevent excessive wheel spin. I feel like that can drop my 60 foot my 1 tenth and ET by 1 1/2 tenth.
If I had a firm shifting trans I'd launch in 1st gear and that would help my 60 foot a lot.

Unfortunately I run into 2 other problems for a record breaking run. The tracks I go to, typically do not have as much traction as some of the better tracks in the US.
That is a known fact.
For example this weekend, the 7.6 ET turbo V8s ran 8.3-8.4. Lots of wheelspin.
They go in the states and consistenly run 7.7 or lower.

That said this track sometimes has a high level of grip but it has to be a special event and then they use the expensive glue. Those events usually mean it's very hard to make even 2 passes in the same day. So no place for mistake or practice runs.

Ultimately, my weight is a big problem. 4400 lbs 2 engines. Matt's car probably weighed 2200-2400lbs MAX but had over 1000WHP. Even as a FWD he had 1.3 60 foots. That is impossible to do on our tracks unless again there is a national event or the kid of the owner of the track is going for a record run in his car (he has one of the quickest 4 banger in the world)

WHP per lbs Matt's car is much higher and it shows with the very high MPH up top.

This event I popped with the windows off to get some fresh air in the back but the aerodynamic drag is huge and reflected in my low MPH.
It will take two built engines with over 700whp each. A great track and 1st gear starts with hard shifting transmissions. to get in the 8s at all.

With the current stock engine stock trans set up, my estimation for a perfect pass maxed out is low 9s. And that will take a hell of a run. Unless I can lose 400lbs +
Click to expand...

Any more plans to try to get the PCM to finally shift the thing? Dave @ TEP been any help with that since he had his working with the stock PCM?

The VFW hood, opticarmour glass will drop ya 100lbs at least.

Matt's whp was in like the mid 800's.. Last that I heard from him a few weeks back, he is aiming for 1000whp, once the converter I got made works out. If so, he
will be doing the same. As the converter is rated to support a 1000+ whp. He can't get more whp as the converter setup he runs slips badly. He has something like
nearing 400psi of line pressure to help with the slip.

For heating... take the glass frames and make ducts to let air in, and let air out. Possibly a pusher fan on the hot air out side. Could
possibly duct some of the air in to blow on you, to cool you down too..

airflow_zpsbf43e37e.png
 
I'll put in a good word for you at the chassis shop since I know a guy who's done lightweight all wheel drive cars lol


Matt is at 2400ish, we are hoping for 3250....but we shall see.. weight is always a killer
 


SlowFiero said:
Matts car made 870 whp at 28psi and ran [email protected] at 24psi. Be a fair bit less than 1000 whp....
Click to expand...
Yes sorry my mistake. He had to making at least 850whp no matter what psi he was running. Takes a lot of power even for a light 2400lbs car to make those kinds of numbers.
Also motors tend to make a little less power on the dyno than at the track. Cooler fresh air, forced fed air in the turbo inlet etc...

His car is nearly half of my car's weight. No matter if I have 2 engines or not, I'd have to put out 750whp minimum on each engine.
And the fact I don't run a wheelie bar and on tracks that don't hook well typically. It will be hard to make good use of the front 750whp engine.

My car was really made to run in poor traction conditions, that's where I have an advantage vs drag cars that will hunt traction even more.

This weekend's race in on an abandonned airstrip made of concrete and it's fairly dusty so traction will be very limited. My AWD car will come in handy...
It will take a very fast RWD drag car to take it down. FWD drag cars don't stand a chance, not in 1/4 mile.
 
jdredd said:
Any more plans to try to get the PCM to finally shift the thing? Dave @ TEP been any help with that since he had his working with the stock PCM?

The VFW hood, opticarmour glass will drop ya 100lbs at least.

Matt's whp was in like the mid 800's.. Last that I heard from him a few weeks back, he is aiming for 1000whp, once the converter I got made works out. If so, he
will be doing the same. As the converter is rated to support a 1000+ whp. He can't get more whp as the converter setup he runs slips badly. He has something like
nearing 400psi of line pressure to help with the slip.

For heating... take the glass frames and make ducts to let air in, and let air out. Possibly a pusher fan on the hot air out side. Could
possibly duct some of the air in to blow on you, to cool you down too..

airflow_zpsbf43e37e.png
Click to expand...
That's one of the ideas I had in mind. But I think two vents will be enough since I have an open floor under the engine. If I decide to close it up for aerodynamics then this window vent and window intake would work well.
 
159mph at 2400lbs is only around 750whp.

140mph at 4400lbs is around 950 whp. Around 475 each engine.

Those are usually dynojet hp numbers as well. I believe ZZPs dyno is a mustang.


You project is cool and different, but let's not downplay what matts car has done. It has the potential to do more, but trying to transfer that kind of power through a fwd drivetrain is a lot harder than many give credit for. I don't see anyone giving him a run for the title of fastest fwd 3800 car anytime soon.
 
SlowFiero said:
159mph at 2400lbs is only around 750whp.

140mph at 4400lbs is around 950 whp. Around 475 each engine.

Those are usually dynojet hp numbers as well. I believe ZZPs dyno is a mustang.


You project is cool and different, but let's not downplay what matts car has done. It has the potential to do more, but trying to transfer that kind of power through a fwd drivetrain is a lot harder than many give credit for. I don't see anyone giving him a run for the title of fastest fwd 3800 car anytime soon.
Click to expand...

Did you punch that in a calculator ?
I find calculators to be less and less precise at higher MPH. They don't take aerodynamic drag into consideration.

950-1000whp is what I'm at approximately. The car ran 141. It ran 139.6 mph in really hot weather and I was down on HP vs cooler days.
I was running rich AF in the low 11s on both engines

I lose a lot of time in the 2-3 shift which I think hurts my MPH a little as well. The car should be 145mph easy at the power level I am now. On cooler days more.
We'll see soon if the trans holds up.

As for Matt's car, who's downplaying ?? Certainly not me. I've said it , the car is a work of a art and a true race car with race parts in it in a race chassis.
It's the record holding GTP and deserves a lot of props !

That said, his time and MPH prove the track was exceptional and I bet the conditions were exceptional as well. Still 8.6 @ 158 mph is an exceptional time regardless of the conditions and the quality of the track. That was a hell of a run !

The respect I have for that car is such that I know it will be difficult to beat it even with an advantage in displacement and AWD. I think the same power in a race chassis I could touch the 8s. Not beat matt. I need a light chassis + more power. That shows how much Matt's car is awesome.

But then again, my car's drivetrain is pretty much all factory stock parts. I think that in itself is cool to run 9s on junkyard parts in any car.
 
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This car is so bad ass......

With that being said, I still would love to see a burn out with one engine in D and the other one in R. That would be sweeeet!
 
We had a crowd around the GTP all night at the 1/8 mile drag. People were extremely impressed by the 1/8 mile ET and the fact the car has twin engines.
Really a crowd pleaser being so quiet and so quick.
On this particular track which is slower than Napierville, we ran 6.21 1/8 mile which is easily a 9.6 sec 1/4 mile.
The new transmission with shorter ratio launches the car harder. I still have about 125-150HP left in the tuning. I'm still running very safe timing and fuel.
 
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