I have a 307 for free and know where I can get a tpi system for 300 bucks. how would this work or not a good idea.I do have this engine for free so I won't be throw away too much money.

 

it would not work if the 307 is a rocket (oldsmobile) The angle of a chevy v8 is 45* and an olds is 60*. The bottom line is the intake manifold will probably not fit.

 

The two manifolds aren't even close. A 307 Olds manifold is wider than a SBC. You could always put a carb on it, though.

 

Assuming the 307 is a Chevy engine it would bolt on and work just fine. If you are looking for max Hp, the 307 is not that good of a match for the TPI. A 307 has a 3.25 stroke and a 3.875 bore, which means it will want to rev to make power and the TPI intake does not like to rev much over 4800 RPM. If you plan to install a RV style cam in the 307 or use the stock cam the TPI will work well. You will need a TPI intake form a Corvette or 85 or 86 F-body to bolt up to the 307 heads; or you could elongate the center bolt holes on the 87 and latter TPI intakes to fit the 307 heads.

 

307's are junk do the automotive world a favor and get it and qucikly throw it away. dont disgrace a beautiful tpi system by putting it on such a junk *** motor

 

Thanks. It is a chevy 307and I thought it would be neat to try this since the engine is free.

 

Well i had my 305 block bored to a 307 and im running a TPI system and ran a mediocre 14.4 at 94mph, with street tires

 

Thats not bad.Are you using stock heads and induction system?I thought a 307 wouldn't have the problem of vavle shrouding because of it displacement.Wouldn'a 307 have a better power potiential than a 305?What was the reason for the factory dropping the 307 anyway?

 

actually its a hydraulic roller 305 motor, and im running L98 vette alluminum heads, No problems with valves so far

 

I hate ignorance..............


Truth be told, my machinist has REPEATEDLY bored a 307 to 4". Combine that bore with a its 3.25" stroke and you have a 327. In 1968 they also went to large journal motors, so a 3.48" crank into the block wouldn't be a problem. Granted, I know that isn't the ideal TPI motor. But will it bolt up???...with a pre-'87 manifold.......YES! Further....in 1968, the 307 came rated at 200HP with a 2 barrel carb. That's pretty close to the 305's best offerings with TPI. If you are gonna knock the 307, you better start knocking all these guys' 305's too.

 

Ahhhh, but he didn't mention what year 307 it was. I have an 89 chevy with an Olds 307 in it, it was rated at a wopping 140hp and isn't good for much more because of the heads they used. And before you say "change the heads" these heads were the only ones that they had for the hyd roller cammed engines.
That car will be getting my IROC's old 305 when I rebuld it.

 

By the way, I like (and own) 305's too .

 

And for all that work and expense you could just buy a 350 with a ton more hp and tq.
I never said the 307 couldn't make hp, but it is cost prohibitive.

 

WOW!!! i guess the cost of distributors and intakes went up. Last time I checked, the cost of that stuff at a junkyard couldn't get you jack for a motor (unless it is perhaps a core) (that actually wasn't a knock Morely...I'm guessing you were actually referring to the E-brock stuff?? ).

As far as the Edelbrock stuff goes, I just through that in there for your knowledge (thought you might like to know).

To give my input on the original question, (which is what I should have done to start with), the main reason a swap of TPI to a 307 would NOT work, would be the heads. To my knowledge, 307 heads never came with hardened valve seats. To this end, you can't run leaded gas with an O2 sensor. You would either have to swap the valve seats (not worth the $$$ for the heads), buy new heads (well...maybe if you are boring out the block, which is feasible), OR, go with a 305/350 to start with. As far as bolt up compatibility, it WILL work.

For those of that insist on knocking Olds engines, I will leave you with this: Go find a guy who really knows Oldsmobiles, and happens to have a few extra diesel 350 blocks laying around (yes, they are worth something), and race him in his Cutlass. My money is on the Cutlass. Do the homework and you might even learn (if you care) why.

 

If we're gonna get on Olds motors, theres really not much you can do to a 307. The heads suck, they're (somewhat) small cube, but you can't rev them due to the main webbing, etc. Reliable as hell tho, my moms car has 225,000 on the 307. About all we've done is change the oil.
Just cause it's a D or DX block doesn't mean its fast. However, if he's bored that thing over a bit (if you call .125 a bit) and stuck a crank in it, then he'd definatly be able to tear some stuff up. Olds did build some pretty good engines, 425's are pretty stout, and 403's would be awesome if they didn't have windowed webs.

 

And we have a winner. I didn't think anyone would snag that in such a short time. GreaseMonkey, maybe I should have you over here when I rebuild the 455 in my convertible .

 

What did I miss here? 307 heads not for use with unleaded gas? Surely you misphrased that?
Mondello?

 

Yes... I did actually. I meant to say Chevy 307 heads. I'm not sure how long they made the 307, but I was under the impression it never got to see the gas crisis/ emissions laws of the mid-late '70's. I'm still trying to figure out where my 'velle came from 'cause it has all its smog stuff.

Quote:

Mondello?

Oddly enough, I never have seen or heard of an article on a 440 build from him, but would be very interested in reading one.

 

How'd we get on Mopars? I'm assuming you're alluding to a 440DX. One of my favorite quotes about Mondello is that he's the Olds guru if you don't own an Olds, If you do he's not. I'll admit he knows a lot more than I do but he doesn't know as much as he thinks he does. Anybody interested in Olds go to www.oldspower.com and www.realoldspower.com They're good sites.

 

This is a chevy 307,and Iam not sure what year the block is.Someone said something about the heads?Forget those heads when any other smallblock chevy head will fit.The block is free and the motor is allready built and running on the engine stand.

 

Heck, if the engines running AND free I'd go for it. Sounds like a pretty fun project.