420A ported head

[TSI4Life]

hello. So im fixing up my talon and im thinking of investing some money to make it a little quicker without boosting it because i dont want to do any engine work. Anyways, i was wondering if anyone has put a ported head on a 420A and if so, what kind of results you have experienced? Any help is greatly appreciated.

 

[LD25Delta9]

I'm not trying to discourage you from anything, but you'd be better off getting some block work done and adding turbo or get some high compression pistons and add cams before you go putting on a ported head. Our heads flow great stock and are rated for right around 400 hp. I've ported and polished my head cause I'm working with a small list of stuff done to my engine that I can actually benefit from it. But with you having nothing but CAI and cat-back, I'd save my pennies. However, you would see some top end gain. My suggestion? Get a light weight underdrive pulley, get some crower stage 2 cams and a 100 shot of Nitrous. You wont have to do any block building and the UDP and cam will help with acceleration. Nitrous is a fairly easy way to add power, and the setups are pretty fool-proof these days. If you decide to follow my advice let me know cause there's alot more to it than just those three things.

 

[TSI4Life]

hmmm damn, theres really no getting around it. I was hoping I could make it a little quicker without a turbo and engine work but psh. So, like iv wanted to do in the past, im just gonna make it look pretty then sell it and get a stock tsi. I dont want to do anything to this car for the reason that its a 420A and when i got the car, the engine was seized so iv already rebuilt this engine once, but only to stock specifications.

 

[TSI4Life]

ok lets say i did decide to suck it up and boost it, what compression and brand of pistions would you recommend? Other than a turbo setup and some pistions what else would i "NEED" so that 10lbs of boost wont give me trouble?

 

[LD25Delta9]

You don't need to build your bottom end to run 10 lbs without causing trouble. Just an afpr, some 440's, a FCD and MS. You can run all that on stock internals. Up to 12lbs before the bottom end will give out. It's our fuel systems that can't handle boost.

 

[xioca]

Have you looked into nitrous?

 

[TSI4Life]

interesting? so just some injectors that can support the boost? What about the ECU, the whole boost and more fuel, would that be a problem. Honestly, nitrous is absolutely boaring to me, id rather have turbo boost. I love the whole forced induction process.

 

[TSI4Life]

"Just an afpr, some 440's, a FCD and MS."??????

Sorry for asking but im still a newb. I know the 440's are injectors, but the other abbreviations i dont know yet.

 

[rush2252]

AFPR=adjustable fuel press regulator MS=mega squirt and FCD? not sure what the other one mentioned was...

Kolby

 

[LD25Delta9]

Fuel Cut Destroyer

 

[TSI4Life]

thank you. All of this probally wont be done until the end of summer. When it is ill be sure to share results and pictures.

 

[94MightyMax]

I would highly suggest ARP head studs also. I hear DSMs have a lot of head gasket problems. Should do your timing belt also if she has some miles on her

 

[kergilman]

I have been boosted at 8-9 PSI for 2 years w/ only stock internals and only 26lb injectors.

 

[LD25Delta9]

I have been boosted at 8-9 PSI for 2 years w/ only stock internals and only 26lb injectors.

That's all the stock injectors are good for are good for. They struggle at 9-10 and usually go pop under prolonged time at that boost level.

 

[TSI4Life]

Hey delta, do I "NEED" megasquirt or can my car run without it? Iv fallen short on money and even if I had to keep the boost at like 6-7 that would be fine on my part as long as my talon would run and boost properly.

 

[kergilman]

You dont "need" mega-squirt unless you plan on forged internals and pushing higher boost. The stock ecu will not know that it is boosting as the FCD is a voltage clamp on the MAP sensor that kills the fuel cut signal when the MAP sensor sees pressure in the intake manafold. The rising rate FMU (apfr) in-line of the fuel supply to the rail will raise the fuel pressure according to the amount of boost it sees on the vaccume line to supply the amount of fuel needed within the capacity of the injectors. No real electronic fuel managment needed.

 

[TSI4Life]

I do plan on forged internals later on down the road once I can get more money, haha. All my extra money is going into the turbo kit, injectors, and body work. So if I put on a turbo kit at 6-7lbs of boost my car will run and boost properly, correct?

 

[RoninEclipse2G]

I do plan on forged internals later on down the road once I can get more money, haha. All my extra money is going into the turbo kit, injectors, and body work. So if I put on a turbo kit at 6-7lbs of boost my car will run and boost properly, correct?

Sort of, you'll need the turbo and all related piping, an FMU or SFMU and the FCD. If you do it right, you can piece it all together for under a grand and enjoy 6psi with good reliability.

More boost will require bigger injectors and pump, and anything over 10-12 psi will require rebuilding with forged internals for decent reliability

 

[kergilman]

You will need a larger fuel pump for any amount of boost w/ the RR-FMU or SFMU controlling the pressure unless you want to risk running very lean.

 

[TSI4Life]

What an FMU and SFMU? so for my car to boost properly without hurting it i need a larger fuel pump? even with stock injectors and 6lbs of boost?

 

[mrTalonAWD95]

stock 420a injectors are 270cc which suck, get something better.

honestly, i wouldnt boost a stock 420a. id rather get a 2.4L block and go from there. maybe a sheet metal intake manifold, but i think the highest whp all motor 420a on 2gnt is like 170whp and it has a bit of money invested in it.

i say go 2.4L with srt internals and spray the living hell out of it.

 

[Locke]

Stock 420a injectors flow 235cc@43psi.

Highest hp all-motor 2gnt is a tick over 200whp.


2.4 is always a good idea, but there is nothing wrong with boosting the 420a with stock internals.

 

[mrTalonAWD95]

thats news to me, then again ive been out of the 420a loop for 3 years.