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Discussion Starter · #1 ·
hey guys just got my nova road worthy however im not too happy about it while driving it for the first real drive i feel it is massively under powered for what it is...which is...
sbc 355
all forged rotating assembly 9:1 cr
stock gm heads
cam is .488 lift
summit high rise single plane intake manifold
full roller rockers 1.5 ratio
msd ecurve dizzy 15deg intial 30 total
profesional products throttle body efi 750 cfm
and a gt45 single turbo on top

the car take s little while to start i think may be due to the time it takes to build initial fuel preesure at start up
it idles at 15 inhg smoothly and it doesnt seem to miss at all on the road
 

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Discussion Starter · #4 ·
currently i have it all in by 2500 is that too early i have it set for only 15 degrees in the advance sweep should i increase the amount in the advance sweep or just add more timing? there is no vacuum is just similuated vac adv since its all digital
 

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hey guys just got my nova road worthy however im not too happy about it while driving it for the first real drive i feel it is massively under powered for what it is...which is...
sbc 355
all forged rotating assembly 9:1 cr
stock gm heads
cam is .488 lift
summit high rise single plane intake manifold
full roller rockers 1.5 ratio
msd ecurve dizzy 15deg intial 30 total
profesional products throttle body efi 750 cfm
and a gt45 single turbo on top

the car take s little while to start i think may be due to the time it takes to build initial fuel preesure at start up
it idles at 15 inhg smoothly and it doesnt seem to miss at all on the road
What are you tuning it with? What heads, cam? What boost pressure? If its slapped together junk you may not be over 400hp.
 

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Discussion Starter · #8 ·
Sorry for leaving so much info out Stock heads cam is .488 lift 292 duration at .050 i believe 114 lsa boost is 5 psi gears are 4.88 on a spool 3000 stall converter in a turbo 350 the efi is self tuning
 

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Discussion Starter · #9 ·
in order to keep the cr low i need a large cc in the head theres not too many options out there for a 76cc head or larger (76cc give me a 9:1 cr) im not sure what STOCK heads they are ...i obviously dont have as much experience as u do as im only 23 yrs old so bare with me do u have any suggestions on heads that have a larger chamber i have thought about running a thicker head gasket but dont like the idea of that i need this car to be a pump gas car due to price and availability of race fuel
 

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How about some pics.

Did you make the turbo system, what does it consist off.(Headers, custom made manifolds, stock manifolds?)

Sounds like you expect the motor to really rpm(4.88 gears), but youve choked off the air flow with a non modified head.

There are plenty of 76cc aluminum heads available with better flow and bigger valves.

Do you know what your fuel ratio is currently?
 

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Discussion Starter · #12 ·
a/f ratio is controlled by the efi system it idles at stoich 14.7 wot richens up to around 11.5 with a boost referenced fuel press reg rises 1 to 1 with boost not my first choise on gears but when i bought the car thats what it had have gotten around to changing them out i will prob go with a 3.55 or something close
 

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Discussion Starter · #14 ·
I would like to invest in a set of heads just can't afford them at the moment so I'm trying to work with what I got until I can buy them but I will try more time and/or more boost and see where that puts me
 

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Discussion Starter · #17 ·
Yeah lol I'm one on the right track I already have an intercooler and a snow water injection kit just have installed them yet I didn't wanna make things any more complicated just yet
 

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Discussion Starter · #19 ·
No definitely don't wanna turn this motor into soup I don't not have a boost retard box I was playing with the idea of an msd btm box but haven't made a move on getting on
 
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