but a true twin setup is a failboat IMO


Depends on what kind of car you run it on I think.


twins hardly spool faster

On a 4cly or 6 cly why would you run a true twin set up? Maybe on a V6 but not a inline. Atleast on a V6 each bank of cylinders would spool a turbo. On an 8 cyl. I would definetly go twin turbo. On an 8 cyl. I would have to also disagree with this statement. Twins do spool faster and can make the same power.

T66 or T76 - twin 57's
T88 or 91mm - twin 67's

Anything above that I think would be your 10.5 outlaw cars and such, and they typically run twin 88's. There are maybe a few guys left I think that a larger single but most are going to twins.

In this application I believe twins spool faster or reach peak boost quicker and can make the same amount of power as a larger single.

 

auto>manual for turbo cars. There's no disagreement there.

As long as you dont go so high that when you shift you completely fall out of your power band, I would think if it spools faster initially because of load , then it will spool back up faster between each shift. Damn thats a long sentence. sorry.

My original post was what you could do to reduce lag excluding an auto, two-step, or what have you.

 

On a v8, twins might be a good option, but like you stated the size of the turbo's must come down quite to have good spool characteristics. I remember when everyone was trying to do twin turbo setups on the 4g63 back in the day. I few even accomplished it only to realize how laggy it is. I think twin stock t-25's were even used and it was laggy as fuck.

 

Find me a turbo that flows like twin 88s and try to fit it nicely under the hood and there's your answer

However you are correct on a banked engine it is nice to run a seperate turbo on each bank, it does do better than running crossover pipes and one turbo.

Right, but when you lengthen the gear you thow the next gear further from it's powerband. With a big turbo on a 4 cyl the gear difference would have to be huge to make more than a 100 RPM difference. The taller gear would bog the motor more than the increased spool can help. Shorter gearing would actually be a bigger help because it'd put less bog on the motor when shifted and get the RPMs into it's powerband quicker.

 

Wasn't that the whole debate about lightweight flywheels? Everyone kept going back and forth about whether the upgrade was worth it. The stock flywheel revs slower but you see boost slightly sooner. Upgraded flywheels reduce the load, and make the motor more rev happy. Obviously now it's no question, but it was funny before how everyone was so afraid of 8lb flywheels and such.

 

Anybody need a 7 bolt clutch? I’ve got a Exedy Stage 2 with around 100 miles on it that I finally pulled off the car the other day. It’s attached to an aluminum fly wheel with a replaceable friction surface.

 

I would def. run aluminum flywheel on turbo 4 cyl. or n/a 8 cyl. Once torque gets to 6,7,800 ft lbs. I think the reliability starts to decline. At that point I would think about billet steel. Still lighter than stock but stronger than aluminum.

A long time ago I had a 90 crx with JG Engine Dynamics SOHC motor with quaife LSD and I think a 4lb flywheel. Talk about zing!!! Car went 9.2/13.9 at 96 mph on motor. This was back in '95-'96 when David Shih was the first honda in the 10's with a turbo and I saw David Buschur run 11.20's at MIR and Jeff Hill's burgundy w/ color matched wheels first gen run 11.90's then drive back to Ohio. Now its common place to do this. Damn I'm old!!!

By the way, hate to see you sell the Talon Spoolin4, best looking Talon IMO.

 

who made that?i don't think anybody but Fidanza made aftermarket Honda flywheels then,and theirs was 7lbs....and no way you could lighten a stock flywheel that much.
Chris

 

I'll have to check. I think I got it from somebody out of Grassroots Motorsports. It was made for autocrossing. Give me some ime to dig that up and I will let you know. Honestly I could be off on the weight, it was quite some time ago.

 

Got it from a company called Paeco (5lb. flywheel) and sent it to Mueller Fabrications and they put a removable face on it and modified it to fit the Tilton clutch. It ended up being 4.75 lbs.

Not sure if Paeco is still around or not.