New ZZ6 Crate Engine with TPI?
#51
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Car: 1988 Firbird
Engine: 406
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Re: New ZZ6 Crate Engine with TPI?
Looking at engine options and the ZZ6 seems good:
http://www.chevrolet.com/performance...gines/zz6.html
I like the TPI setup and was thinking of getting a Vortec TPI base and using a set of 24lb Bosch 3 injectors I have sitting on the bench.
Has anyone tried a combination like this?
http://www.chevrolet.com/performance...gines/zz6.html
I like the TPI setup and was thinking of getting a Vortec TPI base and using a set of 24lb Bosch 3 injectors I have sitting on the bench.
Has anyone tried a combination like this?
-A TPI mounted to this crate engine will probably drop the HP down to 350 at the most, so 24 lb injectors will work fine in this application. I have run similar combinations to this and they all worked fine once you dial in the chip.
-Next a 24 lb injector can support at least 384 HP in my opinion at 43 PSI rated pressure, assuming a BSFC of .4 which most N/A performance engines can easily obtain with a duty cycle of 80%. I personally have run over 425 crank HP with 24 lb injectors by having a engine that obtains BSFC numbers at .4 with duty cycles at 90% plus and never had any issues. Running at or near 100% duty cycle for a street driven car in my opinion is no big deal since you are only operating in that area for a very short time frame. If this was an endurance application then I would agree with the 80% duty cycle limit.
#52
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Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: New ZZ6 Crate Engine with TPI?
My experience and several others I've tuned for say 100% DC is not an issue even for roadcourse duty. Never an injector failure in 10+ years of doing it. I wouldn't do it with worn out stock injectors, but SVO's have shown no weakness to it.
#53
Re: New ZZ6 Crate Engine with TPI?
I bought a zz6 crate motor. I left the single plane intake on engine and installed a Holley Stealth Terminator EFI. I think the engine runs great. I had a chassis Dino done. It is putting out 302 hp at rear wheels. Thought I should get more. Does this seem normal?
#55
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Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: New ZZ6 Crate Engine with TPI?
Sounds reasonable, depending on exhaust, quality of the tune.
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