Yeah, using a wastegate actuator (WGA) seems to work ok, but some cars are throwing codes for too much part throttle boost.

 

How much extra power does the WGA add? Sounds like a work in progress since it is throwing codes.

 

It's hard to say, since each car's PCM handles it differently. One of my friends has the AGP WGA on his 03, and with that and exhaust he was running 13.1@106.

 

I'm confused.

How is the wastegate controlled stock? Once you add the wastegate actuator, what sort of bleed valve do you use to control boost?

 

Nice! Those cars are growing on me, more and more. I just can't stand the wing on them. The looks are a little frumpy besides the wing. But it sure is a nice, cheap, fast, practical little car. Front wheel drive is nice in snow country, too. Is it easy to remove the wing and fill the holes that it leaves?

 

It's easy to remove, but the holes are still there. It's easier just to put a standard trunk on it, or the more popular SXT spoiler.

 

Yeah, axles were a weak link in the 1st gen vehicles as well. Once on slicks and full-out NA or go turbo, axles would start to go. Replacements include OEM PT Cruiser ones, not sure what's out there for the SRT-4 equal-length driveshaft deal.

-B

 

I didnt read all the posts, but the car is here in Houston. He dynoed 502whp and ran a 12.1 spinning through 4th gear from what I heard. Ive met the guy a while back when it wasnt making nearly that power, cool guy. Theyres another black one thats supposed to be making 400+whp soon.

 

spinning through 4th gear??why didnt he just abort the run and try again?

 

My buddy has a Neon '03 SRT-4 and He and I did a race from a roll at around 30mph...
It was DEAD EVEN.
All he had was cold-air intake and a BOV.
He was shifting the thing like he stole it, which isnt good, but we were dead even. No pulling, nothing.
I couldn't believe it.
Those things are fast.
He admitted I would probably get him off the line, due to traction issues, but it was interesting to see that our rolling speeds were about the same.
Beware of those with slicks.. if they hook-up... its gonna be a good race.
-- Troy

 

All those mods and a nearly stock SRT-4 is keeping with your car? Sounds like something is wrong with your car. What are your track times and mph? Guys with mods like yours are running 12s at 108+ with traction. That should be enough to waste a nearly stock SRT-4.

 

It's bunk since when can you double the HP of a stock anything and not blow it up. The engine has a cast crank if the thing ran the number the crank would snap. Also listen to the vid it appears, that the car never got out of third, and if that's the case the numbers would be missed up 'cause of the gears. How would those tiny tires hold 500+ Hp High rpm HP or not they won't. How can the head,cam,induction,exaust, computer,etc suport the HP. Everything looks stock to me, their seems to be no changes ,at all made to the car. The car is too new for a turbo kit, so it would have to be custom, you'd tell that. Don't get me wrong, I think their awsome little cars, the ricers need to know america can build fast 4cycls too, but lets be reasonable. Show me hard facts not fancy vids.

 

The stock crank from the SRT-4 has been used in 800+HP applications. It ISN'T going to snap.

The heads and cams in most turbo cars can usually hold a whole host of power stock. They're rarely a limitation until you reach the stratosphere of horsepower. Most will probably swap cams though to aid spool on a larger turbo. I'm sure the exhaust isn't stock and the ECU has some sort of piggyback or is a stand alone.

All aftermarket turbo kits are at one point 'custom.' Most competent turbo shops can build a manifold for a turbo.

 

My point about the custom kit, was it would have to be custom, and would not fit so "pretty" that you could not tell it was there. Show me hard facts the stock cranks have be used in apps were they made 800+ HP. A engine is basicly a air pump, your not going to tell me, that a stock head can flow enough air to double HP. The only reason you change cams on anything is to flow more air. How does a cam change help turbos spool faster. The only way I knew to make a turbo spool faster, was to lighten the turbine, or use a smaller turbo for the app. And who makes a piggyback for the stock computer? why wouldn't you flash the whole computer? I'm not a fuel injection guy, so educate me.

 

And?

Shaun Carlson is using the stock crank, and he doesn't make 800 horsepower. He makes over 1,000. Stock crank, block, and head.

You obviously know very little about forced induction engines.

T Ladies and gentlemen, we have a rocket scientist on our hands!

Oh, all sorts of ways. Exhaust valve timing, overlap, etc.

This can also be accomplished with ignition timing as well as how rich/lean it runs. Or with a different turbo manifold, downpipe, etc.