Is this possible? i had a 305 HO in an 87 monte SS and i loved it. lots of torque and high end power. I wonder if its possible to convert the 305 tpi (fresh reman) in my camaro to the same specs as the monte engine.

 

Same specs, as in put a carb on it?

 

I know my monte had a carb, but i was wondering if i could get close with the tpi. i know if i change the cam i need a new prom.

 

Maybe I am wrong but a stock TPI shoudl make 25-35 more hp than a carb HO montecarlo. Sounds like your TPI is not working right.

 

it probably isn't. i haven't had much of a chance to drive it though. i have been going through the painful process of un-doing alot of stupidity the PO left me to figure out. my last camaro was an 86 z28 that the PO had ripped off the tpi and carbed it. i guess ill finish fixing it and see how it goes.

 

Yea get it running right I don't think you will want to go back to a CCC.

 

hopefully, all i have left is a new distributor.

 

It already is, apart from the induction system.

 

so my 305 tpi is has nearly the same cam/pistons as the 305 HO?

 

probably similar I think the monte SS made about 170hp and the TPI should be about 215 when working right. Getting the car to 305HO specs would be a downgrade.

 

guess it's a good thing i asked then. LOL. i guess this poor tpi has been abused and misused. the montecarlo used to break em loose with no effort.

 

Just realized you have a TPI auto

87 Z28 A4 LB9 V8 9.3:1 5.0 (305) 190@4000 295@3200 TPI 2.73


Looks like you only get 190 not 215hp Also looks like you probably have 2.73 gears ouch. I think the 87SS got 3.73 gears and that would make a world of difference.

 

i am eventually planning on putting an IROC disk rear axle in this car. what was the gears in a third gen IROC rear?

 

Changes from year to year could be 2.73 to 3.42.

https://www.thirdgen.org/tech-data

Here is a list of every year and rear option.

I think all bird L69s were 3.73

My friend has 2.73 on his mild 350 TA auto and second is a dog until her gets the RPMs up. 2.73 really slow the car.

 

im guessing this will lead to much higher RPMs on the highway.

 

You got it. For an auto I would suggest staying around 3.40, 3.73 will make 1st way to steep IMHO.

 

It looks like the 87 305 M/T came with the same heads the 350 A/T had that same year. so if i can find those heasd it should really up the HP right?

 

I don't know if that is correct. I thought all 305 heads were 58cc chambers and 350 were different but I could be VERY wrong.

Pull a valve cover and see what heads you have now. For a 305 you may just want to put in 1.94, 1.60 valves and give them a nice P&P.

 

I don't know if the volume is the same. good point. what heads do you suppose i should use on this and keep the lower end stock?

 

The only aftermarket heads I can think of are trickflow and world products.

Personally I would punch them out for 1.94, 1.5 valves and port and polish them.

 

I suppose i should stab this new dist, see how it feels and go from there. not looking to race it, just drive it like a jack a$$.

 

Step 1: Get it running right
Step 2: Save Money get the rear rebuilt with 3.42 gears
Step 3:
Step 4: Profit