Well nowhere did I state he should be using a GT40 for the projected power. If you are looking to decrease lag, which is a criteria you created, I would not be looking toward a log manifold. You would want to get the best manifold design to achieve the highest horsepower with the smallest turbo. Like I said before, coatings will help with heat control but it is a turbo and with that comes the issue of heat. If you are that concerned about it get a supercharger.

Depending on what fuel you are looking to use you can use a GT30r, GTX30r, GT35r, Precision 5857.

I had a twin scroll T4 GT35R which was an amazing street turbo and will allow you to make more than your goals when you get greedy.

 

I'm fully aware of the info you posted, gt4088r that you mentioned is what I felt might lead the OP in that direction. I'm aware of the benefits of the longer runners as well. Superchargers make heat, contrary to what S/C guys would like to think, it's only less because the exhaust isn't flowing through it, however their exhaust is still existent so it's really not much better in the end just that the heat is in two areas of the engine bay is all.

I still would point him towards a log, bit more hassle free and a bit less heat which was his concern after all, plus he can keep his stock battery location as well as A/C. Not to mention there's a small benefit in cast logs in that they retain heat thus they retain energy. Even better when coated and wrapped/blanketed.

Any of those turbos would be fairly appropriate but I'd still point him to the GT30R series.

 

Either way, I would prefer tubular but a quality log will do sufficiently well.

 

Neeman, what setup are you moving onto? what are your next goals?

 

pm'd I wont thread jack lol

 

Chill out guys. You're arguing semantics.

Personally I'm a fan of the GT30s (have a GT3076R) and feel a 35 might sacrifice too much in the bottom end for fun up top. But that is just my opinion. Your mileage may vary.

 

As I have said a million times and will keep saying, log manifolds are NOT worth it, honestly if you have never driven a turboed car or have only driven log manifold units, you might be fine with it, remember horsepower isn't everything.. My ideal street s2000 would be a single scroll equal length manifold Precision CEA 6262 with a .83 hotside.. On pump gas.. Bang for your buck achieved.. But as has been said in this thread, learn more about the car first man

 

If your wanting to go cheap then get a log. They make ok power but also choke are motors up alot. Personally I would never reccomend a log over a tubular/equal length manifold. Just look at it this way our motors come from the factory with a nice header with long runners. Now slap on a log manifold along with a turbo and it doesn't take a rocket scientist to see how restrictive it would be. Tubular/elt manifold will make more power under the curve as well because vtec is engaged lower. With a log manifold vtec will have be set in the 6000-7000 rpm range whereas with a elt manifold vtec is set at 4000rpm or lower.

Tubular/elt manifold > log manifold

 

i think the op joined s2000.com for the answers he wanted to hear.

 

I'd mostly agree but...

I've driven both, log in theory can provide quicker spool actually, recall there's less physical room to pressurize. Another fact is that heat is retained by them thus heat is lost through em between spools. Pfab is one of the few making more proper use of a short runner. Log's are a little inferior, short runners are somewhere in between, long runners are better and equal length long runners are the best. Yet I've yet to see a perfected manifold because most every manifold I've seen on an S2000 has too large of tubing, apparently the community isn't aware that the tubing size should DECREASE on a turbo car from the stock headers a great amount. That's ok though.