305 block stock
187 heads ported
ported tpi plenum and base
zz4 cam
1.6 rockers on intake side
stock MAF chip
3.23 posi rear(solid spacer, t/a girdle)
2200-2600 stall HD
m/t et streets
headman headers + y pipe
gutted cat
catback
lca's
relocation brackets for lca's

what would you guys think this would 1) make for power? 2) run in the 1/4?

 

Well, my stock peanut cammed 305 tpi ran 15'7s with no engine mods other than headers LOL. Needed a tuneup, and has a intermittent tps problem, and an inexpierienced driver like me. However you have a zz4 cam and some other mods, I bet you would run maybe a low 15 to high 14? I would say about 240 fwhp.

 

back in my tbi days i ran 15.9 on 3.08 gears stock stall and everything with just headers and exhaust.

plus i figure the 187s are good for low rpms which the tpi is also good for so add the two together and should make for a nice daily/raceable combo. then again they will be ported for better flow but still will retain the stock swirl ramp.

 

I ran 14.8 with everything done below.
No stall, street tires, and with my sub box still in the back.
reaction .739
14.861 @ 93.230mph

I'm guessing mid to high 13's

My brother in law ran a 13.685 @ 105.740mph with a 1989 GTA with a 5.7TPI with headers, 24# injectors and a tune. But he was running really hot.
O.....and had 150shot
LOL....without the spray my 305 walked all over his 350!

 

tenpin what specs are your cam?

and your brother in law must have a dog of a 350 if its only pulling 13.6's on a 150 shot. back when i was an LO3 with just full exhaust with a 125 shot i pulled a 13.5 on shitty kuhmos stock stall and 308 posi.

 

Lift: Intake @Cam 301 @Valve 452 Exhaust @ Cam 310 @Valve 465
Rocker Arm Ratio 1.50

Intake 0.0 BTDC 34.0 ABDC 107 214 °
Exhaust 47.0 BBDC (7.0) BTDC 117 220 °

Not sure what info you wanted. I searched pretty good for the right cam. Crane was my choice.

And when I mean his motor was running hot.....I mean 240+
And on street tires.
I thought he did pretty good myself.
O plus he had a passanger too. So how ever you want to take it.

 

what was your 60ft on the 14.8 run?

and your cam is smaller than mine i think itll work out with the 1.6 intakes to loft 506/510 and duration i think is roughly 210/220.

 

it was 2.1 or 2.2 I think. My slips at home (I'm at work)
Am I safe with going 1.6's? I was told that it would hit the top of the valve cover. Plus anything over 500 wasn't good with stock heads.
What ever I get it wont be a waste. Everything will transfer over to the 350 (if I ever get a chance to start building)

 

well the valve seal to retainer clearance is what you have to worry about for the high lift i think stock is good to .460 or .480 although some have gone higher without issues. im using +.050 retainers so thatll help for the lift and you could get those too if youre going to go for more lift or get the +.050 retainers which are cheaper. as for the rockers and valve covers i havent found out myself yet as my car isnt fully put together. also i was told to watch the pushrod holes on the heads as 1.6s and higher lift you need to open them up a bit so they dont hit.

 

ok guys this is for all the 305 TBI haters,

I OLNY GOT TO RUN 1 TIME!!


i went to newengland dragway with my 800$ 1988 third gen camaro with headder exhaust leak, my friends 18'' rim and tire, 25 lb bucket of tools, 2 jacks, 2 jack stands, 1/2 tank of gas, open diff. with 3.08 gears and 2 bald *** tires and the car was a 5 speed (i hate auto) ok well here it is,

15.60 at 89.5 mph 60ft was 2.52

while i had it at home, i put a cone filter with ebay intake piping,
took out factory headlight

messed with the fuel pressure (needed a digrinder)

cut the y pipe where the cat is, and stuck on a cheery bomb glasspack 25''

with a 15'' pipe off of that coming out the side

advanced the timing to precision.

and a good driver

all in all this car moved for a 305 tbi. mind you i had full weight too i dident strip the car. not to mention the fireballs this thing threw when deacceling form high rpm.

 

Viper.....what all do i need to go with 1.6?

I know the rockers. But is it really worth the $335.95 (on summit for crane gold rockers)

Do I need new springs? Push rods? Retainers?
What else?

 

the $335 cranes arent worth it.. scorpian's are about $235 and jegs brand which are the same dahm thing are $225.

 

thx bandit! I thought it was a little high.

 

depends. you might have to elongate the hole for the pushrods since theyll extend out further. ive been told you can use a rat tail file. as for the rockers you can get anything im just using stock s/a non roller type that i found for a deal. now you have to calculate your new lift with the 1.6 rockers on your current cam and see if your springs can handle it. retainers are fine and can stay unless youd like to upgrade to non factory that are lighter suppossedly helps with valve float. stock pushrods i believe are fine because youre just going to readjust the valve lash anyways. other than that it should be fine. just check clearance on the valve covers nobody is quite sure what there is. usually the roller rockers tend to hit on stock covers so if you get a set of those youll have to upgrade the covers which arent cheap ive found out. boo.

 

ok back to the top from a while ago because plans changed. now everything is the same in that combo but now instead of ported 187s im gonna have ported 601's. any guesses on power and/or times now?

 

I think you should easily break into the 13's, probably mid-high. Tenpin, something must be wrong if you're running a 14.8 with all those mods. My stock 1985 IROC runs a 14.8. The engine has been rebuilt and has very low miles. It is breathing through stock manifolds and a TERRIBLE exhaust system pulled from a 1982 z28 with twin sonic turbo mufflers. I'm hoping for a mid 14 with headers and a new y-pipe.

 

Nope I think I'm perfectly alright.
I have over 100,000 miles on my bottom end, stock heads, and with my custom built sub box in the rear that holds 2 12" subs.
So I was Very happy with my 14.8.
My 60' times were very consistent.
2.175 & ran a 15.069
2.130 & ran a 14.861
2.141 & ran a 15.052
2.144 & ran a 15.082
2.121 & ran a 14.939
Those were the 5 times that I ran. And that pretty much tells the story.
I already have a bare block bored .040 sitting in the barn. A stroker will be coming in 2009.

 

Just curious...you guys saying 13's...what the heck you basing that on?

A 305 with the listed mods might scratch mid 14's,,,I'd lean towards mid-high 14's.

 

LOL....thats where I'm at. Get a stall, drag radials, and take the 100# sub box out....I'll be sitting pretty good.

 

then add a bigger cam, ported 601 heads, lca's, lcarb's, all which he doesnt have. my guess is mid 13s im looking to do 13.5 so i can match last years 125 shot time. and 14.8 is a good time for what he has hes not really getting much traction and those 3.73s probably arent helping that either. plus last year on street tires, stock stall, posi with 3.08s i was able to do a 1.9 60ft. now put some et streets on and a stalls and thats lowered significantly which in return lowers the et. its all about the whole combo just not the engine combo.

 

My car ran a 14.5 with just a cat back exhaust??? 91 Z28, five speed, G92.

 

was that before the gears??

 

91's were rated for hight HP then even my 87, plus its a manual so theres less HP loss to the rear tires.

 

tenpin, ive always admired youre car. i think with a built tranny and about 22-2400 stall. u might be knoking on 13's door.. i think youre injectors are too big..

 

Yeah my tranny already has the vette servo, and someother valve installed.
It shifts pretty good. I have to watch it around the corners, because that 1st gear is so short, when I turn it actually scoots me around the corner. Because it spins the tires when it shifts.
I was actually looking at getting an S10 stall converter this spring.
I swapped injectors, and had my car tuned. If you look at the dyno graph the AFR is pretty good all the way accross the board. It is a couple tenths a little on the high side though. (running rich) But it runs good for what it is.
Thanks for the compliment!!!
I'll run it this year, and start my 385 stroker in the fall and hopfully get that up and running in 2009. I already have the 350 block bored .040 over. Its soaking in wd40 for now.

 

o im guessing you have the .500 boost valve that youre talking about i always wondered what a difference thatd make. i got the vette servo too and i love my 1-2 shift especially with drag radials almost breaks your neck at WOT.

 

yeah thats what I have. LOL...yeah the 1-2 shift is pretty crazy!......but fun!

 

nice get some kickass m/t et streets dr's then feel that 1-2 shift all over again in a new way.

 

That was with the stock 3.42 gears. After changing the gears I haven't been able to hit that time again. Tires are old, can't get a good launch with the lower gears.

 

time to get some tires and come really close if not hit a really high 13's although i dont think your tranny or your rear would like you very much at that point.

 

LOL....yeah. I'm more of a car show guy. But did take my car to the track last year. And will take it this year 1 time.
We have the bay city rollers event, which is really nice.

 

im like you i only went to the track once last year and went to a bunch of car shows. i like my ride looking clean but it also has so umph to back it up just in case. i just like having fun with it.

 

Yeah thats for sure! Thats the best car shows and cruising around!

 

amen brother.

 

considering most 5 speed G92 305's are mid 14's, and you now have a bigger cam and better heads than they do, as well as a ported TPI, i'd say low 14's should be possible with a good launch

Whats your compression and state of tune?

 

The 305 has a rod knock now. Pulled hard to 5800 RPM after changing the intake, runners, and doing some port work. Just didn't last long. Building a 355 for it now.

 

well id assume stock compression if not higher. so 9.5 or a tad higher because i have felpro head gaskets which are thicker but 52cc combustion chambers. as for tune im relying on the MAF to help me out for the most part.

 

alittle tweaking to the prom will get that thing in good running shape, i think it will run pretty strong for a 305 and the mods. low 14's for sure if the car isnt a pig

 

well cant do any worse than my consistant 15.8's last year.