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Guest
Anonymous Poster
Mar 20, 2008, 2:10 PM
Post #1 of 3
(2835 views)
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Hi, me and my friend are restoreing my 1987 Monte Carlo SS. My question is, What do we have to put in the 305 h/o engine to get 300 horsepower out of it and would we need to go with a bigger transmission? that being said if we did need to go with a bigger tranny would we have to cut the body up to modify it for the new bigger transmission?
Also he wants to chop a piece of the frame off, rear rail to be percise and make a new one from scratch it's only about a 5 inch piece. Is this okay> legally and car wise?
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Double J
Veteran
/ Moderator
Mar 20, 2008, 2:30 PM
Post #2 of 3
(2831 views)
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Re: !987 Monte carlo
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Are you looking at restoring it or building a race car?
To me restoring it puts it back in its original condition as from the factory...Numbers match...type thing...
If your looking at getting horsepower, first if it was me...no way on the 305 CID...get a 327/350 something like that..
Older ones were even built from the factory with higher horsepower...
Yes.remember if you change/add that much horsepower, the transmission is going to have to "handle" it ( torque converter stall speed as well) and the differential...what gear is in the rear end?......
If its a small gear like a 2.73,that thing will fall on its face out of the hole....it'll have great higher end power..
You'll need a bigger gear for low end "grunt"..
I suggest you check with your local speed shop for whats available for what you want to do..get all your options then decide whats best for you...
You can even contact places like "Summit Racing"....very good speed/performance place..can clear up all your questions better than I can here.
As far as the frame goes, if its done correctly and reinforced correctly,it should be ok...not for the novice tho ...Racing guys often "box" in their frames to make them stronger.....
Just letting you know that there are many variables to consider when adding that much horsepower,more than just an Engine thing....
Hope that helps you some...
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 20, 2008, 3:17 PM
Post #3 of 3
(2824 views)
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Re: !987 Monte carlo
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Thought: If you really want 300 hp and few headaches check into ready to go marine chev 350s. Whole, new engines. They come with everything but a carb and exhaust manifolds and can take a ton of abuse. I'm pretty sure 260 HP is the standard but 300 was an option for OMC and Mercruiser - perhaps Yamaha, Volvo - YES - they used Chev blocks! Automotive parts still fit but many items will be rust proof - brass or thread lined bolt holes. Most are based on like 1969-72 GM trucks,
T
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