help with power estimate

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syclone0209

Member
trying to get a converter spec'd for my 4l80e build and need an estimate on power from someone who might have more experience than me.

built block partial fill
je pro pist.
eagle rods
stock cryod crank
fully ported vortecs 2.02 1.60's
holley carb intake coverted to efi
custom cam from nolan. not to give away any numbers lets just say a comp 415 for estimation
75lb inj
rpm headers and downpipe
innovative f2-72 turbo dual ceramic bb q-trim upgrade
mccoy a2a
meth inj if i need it

basically i dont know where built motors with larger turbos make their power at. probably keep the rpm's under 5700 with stock crank. if anyone has a build similar and could show me a dyno sheet or has experience with similar builds and can give me some estimated hp and trq at what rpm's it would help. i know its all dependant on tuning but just give me the benefit of the doubt and say i can tune it to 80-90%

thanks
 
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denny

Active member
Re: help with power estimate

Normaly would be between 500 to 600hp.
But if it run like crap 350hp
or with good tune, 700hp.
 
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syclone0209

Member
Re: help with power estimate

TwinTurboV8Ty said:
What brand convertor you looking at?
Click to expand...

george gave me a list of info he needs about my build and hp and he is going to get me the price for the pi and yank built to those specs and we will choose from there. i mainly drive on the street, go to the track maybe 6-7 times a year. i just want something that will last a while.
 
JSM

JSM

Active member
Re: help with power estimate

I would suggest a yank. The ones both myself and Hardman put in (identical convertors built side by side) are working well. My truck actually stalls about 3900 (of course I have v8 torque) but drives really well around town also.

His truck was right at 3400 I believe.

Might have them look up what hardman ordered and either build that or tighten it up just a hair for the more street driving your doing.
 
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syclone0209

Member
Re: help with power estimate

turbodig said:
I'd put it in that bracket too, 600-700, if you get everything working as it should.
Click to expand...

what type of rpm do you think it would make its hp at. probably run 20 psi on the street maybe up too 28 at the track. would 5200 be a good all around guess?
 
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syclone0209

Member
Re: help with power estimate

do you know what hardmans build is like?

TwinTurboV8Ty said:
I would suggest a yank. The ones both myself and Hardman put in (identical convertors built side by side) are working well. My truck actually stalls about 3900 (of course I have v8 torque) but drives really well around town also.

His truck was right at 3400 I believe.

Might have them look up what hardman ordered and either build that or tighten it up just a hair for the more street driving your doing.
Click to expand...
 
JSM

JSM

Active member
Re: help with power estimate

412 cam, 52 turbo, vortec heads, stock intake, eagle rods, external WG (this is at the time and how I drove it, in my garage going through extensive changes now).

My convertor which is identical is behind the twin turbo v8. I knew going in it was a wild guess on how it would work, but without dyno #'s, or anything we had to guess somewhere. 3900 sounds high but it seems to be working fairly well. Both Yanks. George will know some on them I believe also.

The PI i drove I didn't care for on street. Good on track just not a street friendly as mine.
 
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