Stock 304 > comeracing twin tb inlet manifold!!!!!

[pantha8]

hey guys my 304 is just basicly stock, non stroker no major engine mods, if i were to buy a come twin throttle body inlet manifold
what would be involved in getting it on my stocko 5L? could i use standard cam?? would i need to retune?
thanks in advanced guys

Here is a link incase you guys would like a look at what im on about haha.. has a pic of the come TTBM next to the old bunch o bananas

comeracing.com

[T-rex]

I'll start off by throwing in you'll need to modify the fuel rail, tune will help, but as most will say you will get the best gains if the engine has work.

[383 hatch]

Not worth it on a stocker. The best manifold for a stock-mild 5 litre is the bananas IMO.

[pantha8]

im aware that it would be alot more ideal if the engine were worked but im thinkin it cant do any harm to throw it on anyway could it?
and even on a stocko with a major service and a decent tune up there would have to be some sort of gain??? am i wrong?

[Jecs]

the COME manifold is a great manifold for riggin up and they require no cutting to the bonnet. i wouldnt worry about in the fuel rails (getting a braided hose to sit under the throats is piss easy job) which i think COME supply anyway? another bonus is u can plumb it up the standard air box.

any manifold upgrade is better than the bananas, even if the motor is stock. of course figures wont be as good as a stroker motor.

depending what motor work you have planned for future. if you arent building a motor down the track, then id suggest to throw a decent stick in it just for a bit of a lumpy note. if you do have planned mods in the future then just throw the manifold on for the time being and worry bout that later.

and a tune is ideal. the car will run without one, but you dont want to harm the engine but leanin out or burnin extra fuel.

[exec24]

hey guys my 304 is just basicly stock, non stroker no major engine mods, if i were to buy a come twin throttle body inlet manifold
what would be involved in getting it on my stocko 5L? could i use standard cam?? would i need to retune?
thanks in advanced guys

Here is a link incase you guys would like a look at what im on about haha.. has a pic of the come TTBM next to the old bunch o bananas

comeracing.com

I Was looking at the Same Manifold for my VS once i get the Engine Rebuilt to a 355 in the next month or 2, i asked Leon at Awesome Automotive(here in SA) what they were like he said that there too big for anything less than a 383, (even a 355 is boderline)and that he's had issues with them leaning out on certain cylinders, he recommended a few other manifolds, but it all depends as some look like carby manifold others dont

best is to go speak to him, so it suits your application

i ended up looking an 2 manifolds, i Had a Starr Manifold ready to go for the engine rebuild(which i got offered what i paid for it so i sold it) but then started to look into a trickshift twin throttle(this is one Leon recommended) but there $3600 and i had to draw the line at what i wanted to spend

but then ended up buy another Starr Manifold, which are a Standard bannana manifold with a Larger elbow welded in and a 90mm throttle body fitted, alot of people dont like them, everyone that i spoke to who had one said they are a good manifold, they do have there limits but will suit my 355's cam almost perfect

might be an option for you to hunt down a S/hand Starr, Normally go for around $1200

[383 hatch]

im aware that it would be alot more ideal if the engine were worked but im thinkin it cant do any harm to throw it on anyway could it?
and even on a stocko with a major service and a decent tune up there would have to be some sort of gain??? am i wrong?

A stock 304 will go backwards with the COME manifold. The bananas is well suited to a stock 5 litre.

[GRPABT1]

A come manifold is a big fat waste of money, specially in your instance. They are hard to tune out lean spots on certain cylinders without sequential injection. Basically the design causes lean pit on a couple of cylinders and due to the Holden motors batch injection the whole lot needs to be fattened up costing power. Also they are really meant for high revving motors with big cam's and ideal for forced induction really. If your motor is stock, then the stock manifold won't be costing any power. Worry about other mods first and change the manifold once you get more power to justify it.

[twinthrotstatesman]

i have a stoke 304 and have put a came and active manifold with twin throtts and i have a chip out of a clubby and it went better before im told it needs a tune. with a came and cooled air it went like a dream

[Jecs]

A stock 304 will go backwards with the COME manifold. The bananas is well suited to a stock 5 litre.

how will it go backwards hatch? ive seen my mates throw a TP on a standard 304 and pull better numbers on the dyno. and thats from a big flowing manifold.

[383 hatch]

Sure, peak power might go up a bit, but it would be down on power and torque through most of the rev range. I guess it all depends on what you class as going backwards/forwards. I'd much rather an engine that makes good power and torque in the low-mid range than one that makes a few more peak HP. Peak HP really means squat on a dedicated street engine.

[pantha8]

basicly i just more boot from 0-100 not after big numbers up top end, opening up 2 throats while it drops a gear with higher flow inlet manifold is deffinately going to show something once it has been tuned to suit

[383 hatch]

0-100 will be slower. The bananas make fantastic torque down low, a lot of which will be lost with the COME manifold on a stocker. Remember, torque moves the car.

[Darren_L]

basicly i just more boot from 0-100 not after big numbers up top end, opening up 2 throats while it drops a gear with higher flow inlet manifold is deffinately going to show something once it has been tuned to suit

you're going to be very disappointed then
on a stock engine, the COME manifold will bog down

they really aren't designed for even a moderately modified 304.
either boosted or stroker. I've noticed a few people now on various forums have sold their COME manifold for something else after realising it was the incorrect manifold for the application

as Blown V6 said, you are honestly better off with the stock manifold on a stock or near stock engine. The standard camshaft isn't going to work at the rpm that the COME manifold is designed to work at. I managed 250rwhp with the standard manifold & throttle body (cam, flat top pistons). The money you spend on the manifold would virtually cover the cost of a camshaft & piston upgrade which would yield you far better results. And then you always have the option later of upgrading the manifold if you want more power.

Contact COME about it, before you buy one. They used to be fairly up front about it. I remember some time ago they even had it mentioned on their website that the manifold was not recommended for a standard stroke 304

[Jecs]

how much are the COME's worth? they still around that 2400 mark?

save some coin and go torque power with a cheap 4 barrel throat for $1700

[pantha8]

well eventually the idea is to turbo my 304 so i thought the come intake mani would be easy to setup for force ind

[Munz]

def worth it with a turbo strapped on

[Kuksta]

Oh sweet now I understand a little bit more about throttle bodies as I was going to get this for my wagon. But now reading this I see it'll be pointless at this moment in time. I have a full exhaust system on my wagon now with plans for a cam package and cai and maybe a bigger throttle intake, I see mace do packages anyone seen/heard/used there products?

[SUSS8]

Hey mate, I just bought the CAI and 70mm TB from MACE and it's definitely a good cheap upgrade with a noticeable throttle response and better pick up. I was in the same situation as you. Was looking at manifolds and what not but decided to get a good breathing exhaust, CAI,TB and just do all the gaskets In the engine and soon will be getting a tune from greenfoam aka nicefrog. She does pretty good for a stock VR 5L. I'm pretty happy with it

[MILD]

I'm pulling my motor down for a rebuild and in the process will be off loading the Starr manifold with filter and airbox.

I'm in Albury Wodonga and open to offers. Pm me if you are keen.