reilly8282

so im reabuilding my engine...and was planning on vortec heads, and gm parts actually sells the ramjet intake manifold also, i think im going to use that intake. i would like to just rebuild the motor using the same block and just put the heads and a new cam and that intake on it.....do you think that would work? everything says things should line up......how much power would i be looking at with a moderate cam? and if anyone has prices on the ramjet intake itself let me know....

F-BIRD'88

That should work real well with the right camshaft and computer
tuning. The factory Ramjet MPI III stand alone computer
is factory locked with software codes so it is not tunable
or remapable without the lock codes.
So you would have to build with their RamJet cam or simular.

You could /should use a modified TPI or aftermarket computer
system for a more radial motor like the FAST system or ACCEL
or holley EFI stuff.

I'd say 400+ hp is available with stock vortec heads
and ramjet intake + EFI type performance cam. and custom computer tuning.
More with head porting.

e-man

http://www.gmpartsdirect.com had the best price when I was looking at the ram jet manifold a while ago.It was around $1100 for the kit it has in it manifold,distributor,fuel rails,regulator,T-body,injectors,map and knock sensors,and coil.Its PN# 12498032 buying the kit is cheaper than buying it in pieces.

celal

why dont you try stealth ram, afr190,or195 with lt4 hot cam instead of ramjet with vortec heads

tazmision89

If I am not mistaken, Stealth Ram will not fit on Vortec Heads.....

Lessk

I think he means, instead of ramjet with vortec heads, go with the stealth ram, afr190, or 195, with lt4 hot cam.

celal

yes you are right lessk

l think he will get more hp with the hsr and afr 190,195

reilly8282

to bad i dont think ihave quite enough for afr heads and stealth

celal

if you want to use vortec heads atleast go with the fastburn or
e-tec200. with a hot cam you will get nearly 430hp
another options is same combo with brodix vortec style heads.

formula4dissent

Any fresh info on this subject? I want to go with vortec style heads, and like the potential of this intake.

F-BIRD'88

Me too. Its on my wish list for my vortec 406 when/if I change over to EFI.

celal

if you want to go with vortec style head go with the fast burn or
e-tec 170 or 200 as an intake options ramjet is a good choice, if you dont want to spend too much money, buy a vortec style base from the sdpc and use your stock tpi

Parrydise7

iTrader: (1)

That Ramjet looks good, but IIRC it isn't smog legal for third gens.

89Warbird

Despite all the moves to Aluminum heads, Cast Iron heads result in a more efficient engine. You can get a set of modified Vortec's at a very good price from PACE Chevrolet. Also the Vortecs are more than capable of making BIG power.

I am considering the Ramjet to replace my current setup; SDPC lower, Ported SLP runnerns, Ported plenum and 52 mm TB. You can get the Ramjet intake for under $500. I'm trying to determine what else I would need other than fuel rails.

poncho@home

If you move over to the Ramjet, I'd be interested in your current setup. Let me know

89Warbird

Okay.

87Formula4bbl

JFYI, I was just looking at the RamJet option, and found these individual part numbers if you dont want the whole kit listed above. These prices are all taken from www.GMPartsDirect.com. which I found to be cheaper if all you want are individual parts.

Intake (PN 12489371) : $387
Throttle Body (PN 17096144) : $209
Fuel Rails (PN 12553918) : $292
Injectors (PN 17124248) : $64
Fuel Pressure Regulator (PN 17123897) : $61

Theres some other parts which include Distributor, Coil, Ignition Wiring Assembly, and Map Sensor which I didnt list simply becuase you probably dont need these (should already have them) but if you do need them you can get the part numbers from here.

B4Ctom1

You can probably save some money by getting a TB at a wrecking yard or ebay from a truck, and $64 per injector is pretty high, you could use stockers or any of the LT-1, LS-1, SVO ones for sale on ebay.

87Formula4bbl

Ya, I noticed the injectors were high priced, just throwing out the PN though.

As for the TB, I have no idea about that. Is that a 'standard' truck TB?

Shagwell

The Pro Topline Vortec heads are a very nice way to go also. Same money as GM stockers, and they'll flow more right out of the box. They' re cast as though you did a full bowl job on the stock GM vortecs. - My roomate has a set for his v8 S-10.

later, justin...

camaro05

iTrader: (1)

Why are cast iron heads more efficient? better MPG? I would really appreciate if you could elaborate a little. thanks

jimmy_mac

Combustion chamber retains more heat. Hotter burn means more complete burn, more power against piston and less unburnt fuel. Of course that just means you run higher compression with alluminum heads. Hot Rod did a comparo once and the similiar desinged alluminum head actually beet the iron head. They were trying to prove the opposite. I'm sure the heads were not actually identical.

But unless you are really concerned about the weight I woudn't spend the extra cash on the alluminum. That's just me though.

camaro05

iTrader: (1)

thanks