the subject kinda speaks for itself. just got off the phone with a friend and he is willing to trade me a 400 small block. can i get my stock TPI unit to go on it?

 

why couldnt you? as long as they are standard heads on the 400.

 

i don't know what heads are on it. with the bigger CI i would need bigger injectors right?? and would my 700R4 hook up to it?

 

well that tpi is just another intake manifold, it will bolt up to any small block that does not have vortec heads. bigger injectors would help, 24# or so. and 700r4.. do you mean bolt to the engine? as far as i know, it should.

 

Actually if you are running the older style heads, the 2 inner intake bolt on either side are on a different angle. Now if you have an early TPI (pre 1987) intake you will be fine. Now you can also oblong the bungs on the intake to make it work (post 1987), but it looks a bit backyardish to be honest if not done right. 24# injectors should work fine, but you have to take many things into consideration when mixing and matching, cam, TB cfm, compression ratio etc.

 

these are the things i wanted to know my tpi is an 87 and i'm sure the 400sb is old as sh*t but it is clean up with new rings and seals i think it should be alot more than the 350 i have now. also would the 400 kill my 700R4?

 

The 700r4 is a good tranny, unless your going to be putting out like 500hp or more you should be just fine. The 454SS Trucks run pretty much the same 700r4 trans. Now you may want to put a Corvette servo in there to help out some, but other then that you should be OK.

 

The 700r4 is a good tranny, unless your going to be putting out like 500hp or more you should be just fine. The 454SS Trucks run pretty much the same 700r4 trans. Now you may want to put a Corvette servo in there to help out some, but other then that you should be OK.

 

The 700r4 is a good tranny, unless your going to be putting out like 500hp or more you should be just fine. The 454SS Trucks run pretty much the same 700r4 trans. Now you may want to put a Corvette servo in there to help out some, but other then that you should be OK.

 

No, it won't work, don't do it

 

If the questions are will it bolt together properly and can it be tuned to run smoothly, sure. I don't know that you would make 50 more HP because of the displacement increase, but it is worth a shot. I the meantime start saving up for one of those asftermarket pieces.

Jason

 

can i take a pre 87 manifold " http://cgi.ebay.com/ebaymotors/ws/eB...category=36474 " and use the rest of my 87 tpi unit?

 

I do believe so yes. As for the most part the runners and the upper plenum are the same. The main difference is the runners whether it has the cold start 9th injector or not.

 

A 400 with TPI will be the closest thing to a gas-burning diesel you'll ever find.

You'll make about 200 horsepower and 500 ftlbs of torque. The TPI will literally choke the **** out of that motor at 4000rpm and above.

 

hmmm, well there is a fella up here that goes to the track very often with a stock setup on his 400, Some gasket match work and headers, and he's pulling mid 12's out of his car. If I remember correctly he dynoed at around 300 rwhp and around 480 ftlbs.

 

And he probably does it with a 2 series rear gear too!

 

so the consenses is that getting this 400 block would be a good idea?

 

Yeah it's okay. Remember that this will not be a rev machine. Set up your plans for as much torque as you can stand as low as you can, gear it that way, and you will have fun. Change the intake and cam, and you'll be flyin.

Jason

 

Exactly. 300hp out of a 400 cubic inch motor. The TPI is choking the hell out of it. 300 horsepower out of a 305 is somewhat impressive. 300 horsepower out of a 400 isn't.

Perhaps a totally stock 400 with smogger heads and a crap cam can't benefit from an induction that breathes better anyway, so maybe the torque benefit of the TPI isn't such a bad thing (especially if this 400 is in a truck), but if that 400 has even a marginal set of heads and any non-stock cam, the TPI is going to be a major restriction.

 

Just an addendum...

You can use all your stuff, you don't need to buy a new baseplate, you only have to redrill the holes in your '87 manifold, and that's if you use the older style -heads-.