Fp 68 hta

[danl]

I would like to start a discussion on this new offering from FP. FP 68HTA (http://store.forcedperformance.net/merchant2/merchant.mvc?Screen=PROD&Store_Code=FP&Product_Code=NTDSMFP68HTA&Category_Code=DSM-Turbo)

I just purchased one of these and it should arrive friday. I am hoping a couple of the guys who work at FP can chime in on this piece. The only specs that I have to go by are that it moves 47 lbs/min. I assume it is the stock evo 3 turbine wheel? Also I assume also being a HTA design that it works well at higher boost levels, but what levels are we talking while keeping reasonable efficiency?

thanks,
dan

[The Wookie]

Define 'efficiency'. That term is very poorly understood.

[danl]

At what pressure ratio do I start moving out of the sweet spot of the compressor map? Ideally I'd like to run 28-30psi and keeping above 65% compressor efficiency at roughly 45 lbs/min.

[ShaneZ]

Turn it up until it stops making power. :) Compressor maps and "efficiency" numbers on the interwebz aren't the end all or most important thing ever.

[Aaron@English]

If they were conclusive we wouldnt have 456whp Evo3s running around :)

Dan, we have yet to run the 68HTA on a car, but on one of the bikes it was about like the standard Evo3, only spools faster. Please keep in mind that is far from a conclusive test.

It has been determined it will go on the Little Auto and get flogged there with an intercooler instead of the hotpipe and meth that it had prior. Since the Auto is making about 10% less power to the wheels (402whp) than its sister car did at the same boost level (456whp on a 41psi spike), this will be an interesting test with a setup intended to run maxed out.

[danl]

Aaron, thanks for the info, that is what I am looking for. If I can plant down 420-440whp through a 5 speed on a mustang dyno I can get back to my 130+ mph traps. Did your auto car have an intake manifold or were you still using a stock intake manifold? I will start out the season on a stock intake but run some FP2 cams instead of stock cams. I was wondering how much if any a stock intake will hold me back. I think I'll be running 100% duty cycle up top, which has destroyed three 14b's in a row (overspeeding?). So yes, I think I will be maxing this out just like yourself. :)

[Curt.Brown]

Im running one on a relitivly stock 93 Talon(my winter beater), it spools up just as fast as the small 16G I removed but has way more top end flow, at some point I will get this car sorted and get some real comparison #'s but remember this is not my black car, the black car makes any turbo look good.

[Dennis F]

Sounds similar to the FPWhite for the evo

[Aaron@English]

The Little Auto is a stock intake manifold and HKS272 setup. I think the stock intake is really a problem after 7k or so and is probably starting to hurt the car even a little earlier in the powerband. The JMF seems to really make a difference as has the Hawver when we tested one of those awhile ago.

[danl]

Thanks for the great info guys. Curt, somehow I think your winter beater makes more power and is faster than my summer street/strip car.

[The Wookie]

You'll make whatever your car makes at 47 lb/min flow rate.

[Whiskey Appleseed]

curt has a pact with the devil. Enough said.

[Aaron@English]

408whp through the little auto at 25psi.

No hotpipe anymore, ETS 3" FMIC race core, still no exhaust, V3 link, E98.

[danl]

Sounds awesome. Are you still on the stock intake Aaron? If I can get a bit more than that in my 5 speed front driver it'll go 130mph all day long. Then I just have to work on traction to go 10's.

[Aaron@English]

Still stock intake manifold. Might switch to a Magnus or JMF to get the last little bit but we havent run the turbo all the way out yet so we'll have to wait and see.

[danl]

I don't like to bump this thread but would like to add some information to it.

I made 420whp and 350 torque on the 68HTA this past friday on a dynojet. The motor is stock bottom end with 20 over top line pistons (not a typo), balance shafts removed, cleaned up cylinder head, stock size valves of unknown brand, FP2 cams and low mileage evo valvesprings and retainers, stock unported intake manifold, NT throttle body, ID2000 injectors, E85, JMF FMIC.

We tried running it to 8000rpm's but hp was falling off, however it didn't appear that the valves were floating, it was just a natural progression of the torque curve. Boost was 26psi tapering to 23 at 7500rpm.

[Aaron@English]

Didnt try more boost?

[danl]

Didnt try more boost?

WGDC was at 100% for the whole pull. Not sure what to make of it. I did put a larger wastegate flapper in so that I could run about 18psi boost in first gear to get it to stick. In the colder weather it was creeping. Now I'm not so sure the wastegate isn't opening up on me at full throttle.