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Question. for the road racers.

Old 08-19-11, 02:59 PM
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Question. for the road racers.

I'm looking to get a gen3 for open track and street use. There's a few twin turbo and single turbo cars for sale over here. Obviously power potential is different but is there a driveability difference? Do the singles suffer with lots of lag or are they all high end with no torque down low?

I'm inclined to think I should get a single if I can find a good one as it will likely be cheaper in the long run but I wouldn't want to find it a pain for track driving.

Richard.
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Old 08-19-11, 03:24 PM
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Scrub and I both road race with singles (his a T04R/GR67, mine a 500R) and if you have the choice the single wins hands down. Much less heat production, more reliable boost, and a nice linear power curve.
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Old 08-19-11, 03:47 PM
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its hard to get the twins to not overheat in racing use, a single does MUCH better.

it would probably be better to choose a smaller single, as response is maybe more important than HP, although you're never going to be under4000rpms anyways.

i've also noticed that most drivers aren't good enough to really max out a high HP car, so the actual hp number isn't that big a deal, a 300hp car with a responsive and broad powerband might get you better lap times than a 500hp car.

for example if we ran our 120hp integra in the porsche club class against the turbo 911's (400ish), we'd be midpack. the guys who really know how to drive are faster, but the other half of the pack are not.
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Old 08-19-11, 04:07 PM
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I've never run a turbo RX road racing myself but I know a few people. Back when they were new and running in the endurance series' over here, the guys I knew that were running them always had trouble with the twins. IIRC they had spare sets(manifolds and turbos) for the two cars and would always be ready to swap the whole assembly out between track sessions. There were a lot of burned hands and arms on the crew.
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Old 08-19-11, 04:19 PM
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Thanks for the replies guys, you've helped me make up my mind, either single now or a twin for the right price knowing it will likely be a single before long!

I'm seeing a mix of different turbos stated on the converted cars, do you know of any chart where l can cross reference the different turbos for which would be better for road course use?

I've seen, Garret T45, Greddy T78-53d, Trust TD06, Garret T04E, HKS T04R, GT35, TO4S.

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Old 08-19-11, 05:42 PM
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Originally Posted by Richard.C View Post
Thanks for the replies guys, you've helped me make up my mind, either single now or a twin for the right price knowing it will likely be a single before long!

I'm seeing a mix of different turbos stated on the converted cars, do you know of any chart where l can cross reference the different turbos for which would be better for road course use?

I've seen, Garret T45, Greddy T78-53d, Trust TD06, Garret T04E, HKS T04R, GT35, TO4S.

Richard.
howard coleman has a sticky in the single turbo section listing the sizes of the turbos....
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Old 08-22-11, 01:14 PM
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Go Single. Stock turbos will not stand up to the heat.

-Trent
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Old 08-24-11, 01:13 PM
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Originally Posted by j9fd3s View Post
i've also noticed that most drivers aren't good enough to really max out a high HP car, so the actual hp number isn't that big a deal, a 300hp car with a responsive and broad powerband might get you better lap times than a 500hp car.
^^^ this... the fd can be really tail happy with too much power. A lightened car with 250-300whp will be a great start for learning the fundamentals of roadracing. Chassis setup is far more important than power. A small single is the way to go as reliable power costs a lot and then you have to deal with what the transmission can handle. Gets pricey above 300whp
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Old 08-25-11, 03:00 AM
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Thanks for all the feedback guy's.

I'm not looking for the highest horse power, I was more concerned about drivability, I've not driven a turbo'd car on the race track. My last race car was a Mustang with 330RWHP so somewhere around 300 in a lighter car should suffice. Not that I'm going back to actual racing (yet), open track will be fine for now.

Richard
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