95 gt help please 5.0 mods.

[BULLITT]

ok i have a buddy were building his 5.0 right now.


stock 302 motor. only has 3000 on full rebuild.

has forged pistons 9.0.1 compression.

stock rods and crank.

has ford gt 40 x aluminum heads fully ported polished behive springs bronze guides and titanium retainers. 5 angle valve job etc.

he wants to know what shot of n20 wet shot can he run before it pops.

he is putting arp head bolts, rod bolts, main bolts in the motor. a main girdle. high volume oil pump and electric waterpump.

all acc will be removed going to manual steering.

also he is wants to know what cam, roller rockers and pushrods to run.

he wants top keep it safe so what shot could he run before he pops it. we all know the limits of stock rods and crank and block 302's

but what shot would be safest to not create heat to blow the **** up if tuned correctly.

it will have a tko 600 trans. build suspension.


upr full coil k member setup.


this is just for this summer.

over winter he will be building a full motor for a turbo or blower,roots setup.


any help will be greatfull. i will be assisting in building this motor and car.

[69BOSS9]

safe? maybe a 150 shot. Ragged edge 200. stck block 5.0 is only good to 500 if the tune is dead on. Although i have seen some split at 350, so its pretty much a crap shoot. good luck!:thumb_beer_cheers:

[LX2NV]

go ahead and let it rip with a 100-150 shot. take 2 degrees of timing out for every 50 h.p. shot and drop the plugs down a heat range or two depending on how much of a shot. adequate fuel delivery must be adressed too...

[BULLITT]

go ahead and let it rip with a 100-150 shot. take 2 degrees of timing out for every 50 h.p. shot and drop the plugs down a heat range or two depending on how much of a shot. adequate fuel delivery must be adressed too...


is a 255 in tank and 255 inline good enough with 94 oct??? abnd a fuel press reg on rail??

[LX2NV]

Go for it !!

[BULLITT]

Go for it !!


so im guessing this means it will be good to go on a 100 150 shot then with a dead on tune??\

also what injectors should he run??

[LX2NV]

with 19#, me personally, i'd only go 100-125. if he's running 24#, let it rip. you guys won't believe what a 100-125 shot will do to a setup like that. i would suggest a zex kit for a stockish setup like that. the zex kits (imo) are the safest to use on a efi car. no need for a tune, the car will scream and not miss a beat (although a tune would maximize the results). todays nitrious systems are jetted very safe, don't be afraid, just respect it. i haven gone as far as increasing the fuel pressure and putting larger fuel jets in just for insurance until i was comftorable. change the plugs and retard the timing and all is good ! i have ran low 12's spraying with a plate system (75hp) and cast pistons, stock crank/rods/bolts @ 6700. never a problem. i built the motor. motor ran for years and still is ! i just talked to the buyer of that car a few weeks ago, he said it runs fantastic and he has been spraying it too. thats because i tuned it. ;)

[PEDD01GT]

so im guessing this means it will be good to go on a 100 150 shot then with a dead on tune??\

also what injectors should he run??


I ran 11.80's on a 100 shot and a $150 bottom end for 2 and a half seasons and never hurt a thing (untuned for one of the seasons to boot).....If you go 150 or larger I'd say get a purge kit, but you'd be on borrowed time anyway, so stick to 125 or less.

[BULLITT]

with 19#, me personally, i'd only go 100-125. if he's running 24#, let it rip. you guys won't believe what a 100-125 shot will do to a setup like that. i would suggest a zex kit for a stockish setup like that. the zex kits (imo) are the safest to use on a efi car. no need for a tune, the car will scream and not miss a beat (although a tune would maximize the results). todays nitrious systems are jetted very safe, don't be afraid, just respect it. i haven gone as far as increasing the fuel pressure and putting larger fuel jets in just for insurance until i was comftorable. change the plugs and retard the timing and all is good ! i have ran low 12's spraying with a plate system (75hp) and cast pistons, stock crank/rods/bolts @ 6700. never a problem. i built the motor. motor ran for years and still is ! i just talked to the buyer of that car a few weeks ago, he said it runs fantastic and he has been spraying it too. thats because i tuned it. ;)


yeah were deff going plate system. also he has the GT40 INTAKE on it. is that any goodor should he change it. he dont like it. andi think its junk hahaha.


also i need to know what ratio roller rockers(1.6 or 1.7) and cam he should run. he wants a matched setup. so theiris no ptvc issues. also what size pushrods he may need???


and seeing as who knows what the timing is were shouldi start the timingat for backing down. 0 advanced 10 advanced etc..... let me know thanks.

[LX2NV]

yeah were deff going plate system. also he has the GT40 INTAKE on it. is that any goodor should he change it. he dont like it. andi think its junk hahaha.


also i need to know what ratio roller rockers(1.6 or 1.7) and cam he should run. he wants a matched setup. so theiris no ptvc issues. also what size pushrods he may need???


and seeing as who knows what the timing is were shouldi start the timingat for backing down. 0 advanced 10 advanced etc..... let me know thanks.


rockers will depend on cam and clearence.... you MUST check ptv, don't assume !

swapping the intake won't really deliver any big results

timing, again take away 2 degrees of timing for every 50 h.p. from where the timing currently is.

[BULLITT]

rockers will depend on cam and clearence.... you MUST check ptv, don't assume !

swapping the intake won't really deliver any big results

timing, again take away 2 degrees of timing for every 50 h.p. from where the timing currently is.

ok well if the timeing is being reset. since the motor is out. and so is the dist. were should i start at then???


also he was looking at 1.6 roller rockers, ithas stock dis/compression pistons but they are forged with valve relieafs in them. stock length rods etc.

right now it has a b303 in it. he wanted a little more agressive cam. what should he go with??


also found out hehas 30 lb injectors on this baby. so his fuel system is golden. with the other stuff were putting on it.

[LX2NV]

ok well if the timeing is being reset. since the motor is out. and so is the dist. were should i start at then???


also he was looking at 1.6 roller rockers, ithas stock dis/compression pistons but they are forged with valve relieafs in them. stock length rods etc.

right now it has a b303 in it. he wanted a little more agressive cam. what should he go with??


also found out hehas 30 lb injectors on this baby. so his fuel system is golden. with the other stuff were putting on it.


timing... i'd start at 10 degrees (stock) and take it back from there, or tune the car on motor and go from there. so if it takes 12 degrees and you want to spray it with say a 100 shot, then you'd be at 8 degrees. cool ?

i have had good luck with the "B" cam, all the haters can shove it. 1.7 rr's will add (approx) .027-.035 lift... so it would be roughly .515-.520 lift, it would make the cam a bit more agressive. i would run what he has, if he's got 1.6, run 1.6. i am a huge advocate of custom cams, if you got the cash...