?307? - Impala Tech
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post #1 of 13 (permalink) Old 08-16-2010, 10:44 PM Thread Starter
 
 
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?307?

was wondering if there is a cheep fix, short of punching the bores out to give my 307 a little more umph. trying to keep it as stock as i can. i know the 307 is not much to work with but its all i got. would a cam or new heads work. got my hands on some "i was told" 327 double hump heads. i could not tell ya what they are unless i had a picture of a true 2 hump head. the guy who gave them to me knows his poo so i would think he aint barking up my tree. i just want a little bigger smile on my face while i am trying to put the gas pedal through the floor. it does have a Edelbrock intake and carbon it and i know that is not stock, but the original is in the garage. came with the car. thanks for the help
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post #2 of 13 (permalink) Old 08-17-2010, 12:56 AM
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if your motor already runs pretty well, I'd think about putting your time and money into either a better rear-end gear or an overdrive tranny. They've got better low gearing than the old 3-speed auto that I'm guessing you have.

the 307's biggest problem is it's heads and the double-humps are 'ok' if they are a real good deal for you. you can get even better, new, iron heads in the aftermarket for I think $400.

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post #3 of 13 (permalink) Old 08-17-2010, 02:27 AM
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307 is a 283 block with a 327 crank shaft so it will respond to any hop up a 283 can take. If you find a 350 block (4.000 bore) you could put the 307 crank in that block and you will have a 327 when you buy new pistons. On the street there is no substitute for a bigger motor. Rather than hopping up a small one I would look for a 400 SBC out of a pick-up truck or Estate Wagon or similar heavy car and stuff that under your hood. Your intake and carb on a 400 SBC will wake that motor up quite a bit as most were powered by only a two barrel.

Big Dave
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post #4 of 13 (permalink) Old 08-17-2010, 08:47 AM
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Keep the motor you have in the car and build a better, bigger motor when you get the extra cash. Once the replacement motor is finished it can be installed over a weekend. Also a 200R4 trans is a good overdrive replacement for a powerglide or turbo 350. You can use the same drive shaft and cross member.

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post #5 of 13 (permalink) Old 08-17-2010, 03:04 PM Thread Starter
 
 
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thanks for the info. i am running a PG. my friend is trying to get a muncie rock crusher and wants me to put it in. that seems like a lot of work getting that all dialed in though. i have seen some of the metal work going on in here. i have done a little. and when i say alittle check the pic out. i love this car. nicest thing i have ever owned. want to make it fun and last longer than me since the son will get it when i kick it. i have fixed something everyday, and look forward to the next free moment i get. had a 75 ironhead sportster and chopped, fabbed, and wrenched on it constantly. sold it for personal reasons and hated life ever since. keep the ideas coming. questions on th200r4. any specific year i should look for. know the were in the GNX, Montes, and cadillacs. i am sure i could get one but i am sure there is a difference in performance per each application. thanks for help




ps the copper was from a 2" drain pipe that rotted. beat and battered it into submission. the only think that was not beat was the stem.
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post #6 of 13 (permalink) Old 08-17-2010, 04:22 PM
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What are your rear gears? I wanted to swap my TH350 for OD and it did not make much sense since I have 2.59 gears in the back. If you do not know, check your RPMs at 60mph. Mine is running below 2K. OD will most likely drop that to around 1.6K which is not so good.
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post #7 of 13 (permalink) Old 08-17-2010, 05:30 PM
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200R4 out of a 80s Camaro or Monte will work.

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post #8 of 13 (permalink) Old 08-17-2010, 06:55 PM Thread Starter
 
 
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does that apply to any camaro. I can get ahold of one cheap but i think its a 6 cylinder.
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post #9 of 13 (permalink) Old 08-17-2010, 07:21 PM
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If you plan on rebuilding the 700R4 with all new parts it would be ok. The 2.3L V-6 didn't get the heavy duty parts and clutches used in a 5.0L V-8 as it didn't make enough torque to break anything.

Big Dave

Last edited by Big Dave; 09-10-2010 at 06:14 AM.
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post #10 of 13 (permalink) Old 08-17-2010, 09:21 PM
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Thats about right.

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post #11 of 13 (permalink) Old 08-19-2010, 04:02 PM
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James I dig your creativity. I made something similar out of scrap pieces from cutting out the rusted floors in my Caprice. Yours is much cleaner- mine is more of a "rat rod rose" .
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post #12 of 13 (permalink) Old 08-19-2010, 06:09 PM Thread Starter
 
 
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thats awesome i like that rustic touch
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post #13 of 13 (permalink) Old 09-10-2010, 12:57 AM Thread Starter
 
 
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Well surgery done two weeks ago and still hurtin. But as mentioned before I was given some heads that were said to be double humps. No. There not. They are actually buick 350 heads which come to find out are a rather rare production. Well they are for sale and I am looking forward to when I can use my arm again to do some wrenchin. Shortened ulna bone 3mil. Thanks for all the info.
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