looking for a good carb and intake and cam to use on my 85 trans am , i was looking into the edelbrock rpm series , im lookin for extra hp for temp til i build my other motor,any suggestions?


nick

 

You've already got a good carb. Keep it. If it isn't "fully capable", go to the tech articles linked on the thirdgen.org home page and follow those modifications.

An Edelbrock RPM q-jet manifold would be a good upgrade over stock and would allow you to keep the stock q-jet.

The RPM cams are cheap, but you get what you pay for. Consider a Comp XE cam, like a 268. Same peak power and torque, more at lower RPMs than the old-school Edelbrock cam will give you.

You're going to need a higher stall converter to let these things work together. But they'll all transfer over to your other engine, as long as it's still a small block Chevy.

This all assumes you upgrade the exhaust with headers and free-flowing exhaust all the way to the rear bumpter. If you don't do that, the rest will be wasted.

 

YOU NEED TO CHECK OUT THE LUNATI 305 THEY BUILT A WHILE BACK TYPE LUNATI 305 INTO YOUR SEARCH ENGINE AND CHECK IT OUT 343 HP WITH LIGHTLY WORKED "416" CASTINGS.

 

Before you get into that you need to decide whether you're going for an all-out 305, or just improve it until more displacement is installed.

Sounds like the originator has already decided on the latter.

Besides, the combo I discussed is already in the 300+ GFWHP range.

 

wow thanks for all the good info , i plan on building something where i can get close to 500 hp N/A and i was thinkin along the lines of a big block pontiac but i still wanna carve corners as well so im thinkin the big block will weigh me down too much so im unsure , id like to keep a pontiac block but i could always go with chevy,any suggestions on this since u been so helpful?

tryin to compete with my dads new corvette lol!

nick

 

Just FYI, the buick 455 weighs in approximately the same as an SBC, but obviously has significantly more cubes. hint hint.

But yea, an SBC will be a lot lighter than a pontiac motor, and the parts to get it going faster are a heck of a lot cheaper and more plentiful.

So I think you should follow five7's advice. Those things can be transferred over to a HOT 350 or 383 for the most part.

 

500 HP NA is a lot of motor. Basically nothing that will do a 305 right will transfer over to an engine of that type except the motor mounts.

You can do 500 HP NA 383's, but you're talking a race-manners engine. It gets easier and better mannered when the inches increase. The 455 Pontiac is a decent choice to keep the weight down and inches up, but difficulty and cost will be higher than a SBC.

The surest 500 HP NA SBC comes from places like Shafiroff. Search for user BADDEST305 if you have any doubts.

With those ultimate goals in mind, keep the 305 mods simple and as low-cost as possible.

 

my friend mentioned something to me about it being a lil pricey so a chevy would be more ideal and cheaper to build so thats what im gonna do just dunno what size block im gonna go with , i heard changin plugs on like the big block 454s and such can be quite a pita

 

If you plan on building another engine not sence in spending several hundred on a card,intake and cam when that money could be better spent on the new engine. Best bang for you buck would be to buy a set of gears. At best with stock gears you have a 3:23 at best. Go with a good set of 3:73's or 4:11's(but I dont realy suggest those lose fuel mileage, but would give you a good jump) With 3:73's you will feel like you have a new engine. You should have 3:08's or 3:23's and they will also accent th new engine nicely

 

yup defanately planned on the gears , i plan on setting the car up for street and show no drag , but a hell of alot of power

 

go get a 500cid Caddy engine.......big cubes,not much more weight than a small block chevy, alot less weight than a Big block chevy. and hey..... as long as its GM engine its not debotchery!!!!





Sorry if I misspelled it........public schools you know...

 

a friend of mine is into big block caddys for some reason im thinking they are expensive to build

 

i have a elderbrock performer intake and a non cc qjet with hedman headers shorty style, custom y-pipe,3" piping, flowmaster 80 series duel outlet,timing ser 8*btdc,and a 2200stall converter...is this a good combo and how much hp is this combo puting out

 

Big horse power takes big money, money makes anything go fast..........even a Ford........Your best bet may be to check out some crate engines. most of them are reasonable and have a warrenty. I have spent thousands of dollars building racing engines and could have gotten more bang for not much more money and had all new parts where I spent all that money to have used parts reworked or what have you. Crate engine is a really good way to go

 

Exhaust first, then unless your pulling the top end apart go with an RPM intake, and a 600 carb. Will help some, but the cam in that thing is WEAK!!! I know I have built them before. Hard to make alot of power without getting inside of the motor and doing some serious work.

 

Ok guys, not trying to take over, ? along same lines. I have a 305 carb also. New rochester with flowmaster catback. First, If I go with heads, do I need to do anything when I pitch the air pump, I am thinking I might pop a code. They seem to have port for oxigen sensor. What would be good header pipe size. Good Y pipe size. I am thinking hi flow cat, the going with flowmaster cat back. Comments?

 

Not real sure what port in the head you are talking about. O2 port is in the exhaust. As far as headers and y-pipe go, if you already have a cat-back system go with either Edelbrock TES or Hedman, both have a y-pipe to complete the system. Edelbrock comes with one, and Hedman offers one to fit onto their shorties. If you really want a good exhasut run an LT setup, check around there are alot of guys on this board running something like this. I know MW66nova has a system that is working great for him.