For any 305ci fans here is a dyno run of my 87 305ci W6
pocket ported factory heads, 2030 Compucam, 1.6 roller rockers, all free mods, Edelbrock shorties and 3'' exhaust, Ed M mail order prom. Accel coil

 

Impressive for a mail order chipped 305.

Good job

 

I have to agree. Those are very good results. Heck your 305 makes more peak torque than my 350. Allen

 

STICK OR AUTO ?

 

5-speed...
Engine likes 13.1-2 Air/fuel ratio, lost HP if I richened it up more. Peak torque surprised me, sort of funny watching a SBC run out of breath at 4400rpm though.....

 

that is funny huh only 4400 ? when u drive her on the srteet do u feel it stop pulling after 4400 rpm ? i had a lil 305 and it pulled ok till about 5500 .

 

cool results! im actually in the process of putting my motor back together and im ganna have a similar setup.

 

whos prom?

 

My 305/T5 Formula dies around 4600 RPM.... sounds like you had either strong runner (oddly strong) or the "Seat of your pants" is broken

 

with a cam and bigger aftermarket TPI stuff, a 305 should be well fed till 5000-5500rpms as most 350's die at 4500-5000 on same stuff.

but nice numbers nonetheless

 

Mine pulls over 5700 rpm's

 

HOW HP DIFFERENCE WOULD AN AUTO MAKE ? ANY IDEA ? THX.

bILL e.

 

Maybe 5% less RWHP. Allen

 

about my 305 that pulled to 5500 it had a after market intake carb and headrs. cam was stock i think . it was a 5 speed car with 373 gears . i had no problems going to 5500 rpm .

 

Ed Maher..moderator/contributor to TGO

It definetly quits pullin after 4500, by 4800 it feels dead..
But that is the trade mark TPI system. It runs 13.80's at 100-101mph, 2.15 60".... maybe time to install that Garrett T4 turbo kit I have under the workbench...

 

I have mine shifting at 6000rpm on the 1-2 shift and 5600rpm on the 2-3 shift. Pulls hard all the way. This is with TPI. Allen

 

Okay, it seems that everyone with a 305 is saying they pull way past 4800 RPM, but it also seems that everyone that says that does not have stock equipment.

I thought we were talking about stock runners/base heads, etc. With that, my stocker (w/ headers/exhaust) only pulls to about 4600 RPM, and dies a quick death.

 

Heck ....me too I have 251 rwhp and 318 rwtq ....untuned and rich but sheeeeze WTG man

 

Ed burned my chip too.

 

IROCZ4BD3, do you have a dyno sheet to prove that your engine pulls to 5700 rpm? I would like to see that before I put stock in your claim.

with the automatic and the STOCK chip mine put down the numbers in my sig. I would say I would match you on power with the 5speed thats in the car now, but how the heck are you makin 350rwtq!?

 

I guess I am glad I don't have TPI. Your torque curve is alot more peaked than mine, Tuned Port for ya. My torque curve holds up longer on both ends. Mine is nearly flat from where it registerd 325 ft/lbs from 2,300 all the way to 4,000 or so. I peaked at 340 ft/lbs at a low 2,800. My 305 pulls to 5,500 and it has all stock equipment except for the headers and tuning. Stock 305HO/350TBI cam, pocket ported & gasket matched 081 heads, stock flattop pistons with 4 valve reliefs, stock forged crank, stock X rods, gasket matched stock throttle body intake, stock TBI, custom chip. I made 245 RWHP @ 4,800 with a TBI engine.

I now have an edelbrock performer bored to 2", a 454 TBI, and 350 injectors. That has awoken this engine on the high end above 4,400 or so, with no apparent loss in low speed torque.

 

Never gave any torque numbers that I see in any of my posts.No dyno sheet either but after 3 yrs of taking it to the racetrack 3 times a week,I systematically figured out where to shift 1 to 2 then used the same system for the 2 to 3 shift.My porting was NOT done with a dremel but by someone who had access to a highly tech machine shop.The openings on the plenum are siamesed together as are the SLP runners.The base is ported all the way thru each runner and when installed you could actually feel how much lighter it was as compared to the stock one that we took off.I had a CUSTOM cam ground by Comp Cams to fully use the ported intake.I purchased a set of ported TPI heads off a friend then had them sent to my machine shop for screw in studs,replace/recut the seat on the valves,clean up the porting etc.But if you still don't believe me this sat it willbe at the Nat'l gathering racing at my track Cecil County so you can see for yourself.BTW I cut 1.8 60'

 

Not on street tires .

 

1.9's on Pep Boys Futura Ulta Z's & got plenty of timeslips to back it up.Was only able to run 14.0's with the street tires and only picked up a tenth w/ the DR's.

 

IROCZ4BD3, I was not confronting you about torque. I was asking turbobike how the heck he got that much torque. I was confronting you about your claim of 5700 rpm, which if you have your intake hogged out that much maybe your engine does pull that high, I did not know you had siamesed all that stuff, now I do. I do have to wonder though, why are you running the same times as me? with my automatic i went a 13.9 with a 1.98 60ft at only 96.5 mph. Now with the 5speed and a horrible 2.2 60ft i am trapping 98.5mph. my intake is just a lightly ported and gasket matched stocker. some interesting numbers in this post......

 

You picked up 2 MPH by swapping to a 5spd? Sweet! Sorry - I realize I'm off the beating path here... just acknowledging that.

 

1Meanz...the torque...surprised me too...
I think most people put to much cam into thier car for a TPI, the Comp 2030 cam is all low and mid range specific. Thats why the hp drops hard after 4400, though. I did a couple tricks from David Vizard books, roller rockers, 30 degree angle valve cuts, really tight on the lifter nut trick and on the leaner side of the air/fuel ratio.

 

I'm like the post ***** of this thread, but can you explain what that is exactly, and what's it's purpose is?

 

Goy...on page 105 of Vizards book "Smallblocks on a Budget" he explains that taking up all the excess play in the lifter gives the engine more usable cam lift and duration, it also reduces valve bounce and lifter leakage. He goes through a series of steps on how to do it., I picked up a consistant 1mph in 1/4mile..about 15hp..he claims 20hp... I guess allot of little things add up!

 

I had a '91 Formula LB9 dual cats pulleys, Jacobs, SLP, 1.6 rockers and a flowmaster. It pulled 5800rpms all the time no sweat, was the most fun in 3rd gear (T5).

 

85rocker your car does not pull to 5800rpm usless you have a miniram or a super ram. LTR setups do not pull that high period.

 

It might make a lot of noise and rev up to there, but it's not "Pulling" anything besides a lot of gas out of your tank at that speed.

 

agreed

should have said 'makes' or 'does' or 'is capable of' 5800rpms using 'pull' was a poor choice of words.