Pulling with a BIG single

Ryan, I would try the HT4C as a single.

BTW: Did you find the rule thing about running Pro Mod with twins at Indy?
 
Bobcat698 said:
Ryan, I would try the HT4C as a single.

BTW: Did you find the rule thing about running Pro Mod with twins at Indy?
Click to expand...


Yeah I did...thanks for pointing me in the right direction there! Did you get my email back or that Data System?


I tried to edit my above post but the comp wouldn't let me. Full Pull Prod is the best suited for me currently as they alow twins and I may go that route.

RickFPP....what is the exact ruling on the twins. It says 3" inducer bore...Are you guys alowing bushings? My turbo is a 3.4" bushed down to (I made up 3 of them...2.8",3" and 3.2")

Thank in advance...Ryan
 
Ryan if you plan on running the FPP Pro Street I would ditch the twins and go with a single you will make more power with a larger single than with the twins
 
DieselTweaker said:
Ryan if you plan on running the FPP Pro Street I would ditch the twins and go with a single you will make more power with a larger single than with the twins
Click to expand...

Yeah, you know I am hearing so many different opinions on which makes more power, which makes more torque but in the end...no one can really tell me why.

So lets hear it...why are singles better than twins or why are twins better than singles???

Ryan
 
No matter which way you slice it, a set of twins will have more drive pressure than a large single (you have the exhaust traveling through two turbine wheels), which is why a large charger in a set of twins will make more power by itself as long as you can get it lit. However, the large single will have a very narrow rpm window it can be effective while the twin configuration with the same charger will have a very broad band of power.

-Tom
 
DieselTweaker said:
Ryan if you plan on running the FPP Pro Street I would ditch the twins and go with a single you will make more power with a larger single than with the twins
Click to expand...

X2

Ryan

If you plan on FPP Pro Street or RWYB a single is the way to go. Twins are limited in those FPP classes to a 3" inducer on the atomspere charger while singles are unlimited.
 
RyanB,

Here is the rule for twins in the Pro-Street for FPP Turbocharger:

Turbochargers are limited to dual stage set-ups. Twins are limited to a 3.0 inch inducer bore on the atmosphere turbo; the bore will be measured using a 3.05 inch slug or calipers. COMPRSSOR WHEEL MUST PROTRUDE INTO 3.0” BORE

You can “bush” them down but the compressor wheel must still protrude into the bore. Any bushing must be welded in place with no air infiltration possible around the bushing.

Keep in mind that the tech Officials reserves the right to refuse any turbos that are in question. I would suggest to have a “Plan B” in place in the case that the bushing does not meet the techs approval.

Let me know if you have any further questions.

You can email me at USAEastTech@gmail.com if you have any more questions or post them on the forum. Hope this helps you out.
 
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