Firstly, I'm copying my post from one thread to the other, because there are apparently two of you with GS Spyders. YOU DO NOT have the 4g63 (turbo engine in the 2nd gen and all 2L in the 1g) you have the 4g64 - a 2.4L SOHC Engine. Go to Vfaq.com and read it. ALL. Then come here and post. Turboing it is not a good idea right now for a million reasons, it will be done eventually, but bugs are being worked out at ddynopower.com - if you're obsessed with more power, without turbo, and you'll want to turbo it eventually, dont do anything, because you'll have the change it all later. Just save, because turboing the engine (and probably swapping to a DOHC head and many other things) will NOT be cheap. If you want to get that so it's a 2.4DOHC Turbo with like 240HP at 12psi or so, you're gonna need a few grand to kick around, and a rebuild if you want more power. But use the SEARCH BUTTON IN RED!!!!!!! This has been discussed a million times over. Not to rant on you guys, but rules are rules, and the poor moderators cant do everything. We dont want chaos like some of the other car forums. If we keep it organized it'll be much better. Peace and welcome...

 

240hp at 12 psi or so? I think thats a pretty far fetched assumption. Allow me to shed some light. On the DOHC 2.0 420a, 4psi will on average yield in the area of 210-220 at the crank, or about 180hp @ the wheels. This is with a stock exhaust system. 9psi will up that power to around 240hp @ the wheels. 12psi on race gas, and well you can imagine. 12psi on race gas in an internally stock 5 speed RS/GS will net high 12's with a good driver. Now, take a DOHC 2.4 liter 420a, and the power gains will be substantially more. I say wait till the Neon SRT-4 comes out, then do a complete engine and tranny swap. Turbo 2.4 liter 420a from the factory with a heavy duty 5 speed transaxle and equal length halfshafts

 

240hp at 12 psi or so? I think thats a pretty far fetched assumption. Allow me to shed some light. On the DOHC 2.0 420a, 4psi will on average yield in the area of 210-220 at the crank, or about 180hp @ the wheels. This is with a stock exhaust system. 9psi will up that power to around 240hp @ the wheels. 12psi on race gas, and well you can imagine. 12psi on race gas in an internally stock 5 speed RS/GS will net high 12's with a good driver.

About the 420a turbo'ed:

When you say 9psi with 240hp@ the wheels you must be referring to internals upgrade, fuel management system, a whole lot of other stuff because I am running 10psi on pump gas and if im luck im getting 200hp to the ground....and 12's with 12psi and race gas.....you would need major tuning, slicks and a fully gutted car...
I basically run with a gutted car all the time weighed in at 2690lbs....thats still damn heavy....but I ran 9psi at the track and netted a 14.3 over the weekend. I'm not a professinal driver but did pretty damn good....I don't want to pick at this but saying you can hit 12's with just 12 psi and race gas on a bascially stock GS/RS is just out of any bodies range....maybe high 13's but not 12's

 

Something is wrong with your car apparently. It is dyno proven that 4 psi will put down 176hp at the wheels. 10psi on pump gas? Thats stupid, I'm sorry. I would NEVER run 10psi on pump gas. No wonder youre running horrible times. I have personally watched a Star Stage II kit on a 97 ESI with 80k mileswith a stock exhaust and a slipping stock clutch run a 14.6 @ 96mph with barely 4 psi. No, I dont mean on upgraded internals. With a HRC stage II kit, 9psi usually nets somewhere in the area of 13.7's and all on stock internals. A stage III kit includes upgraded internals and a fuel system upgrade capable of pushing out 15psi. That usually gets high 12's to low low 13's on pump gas. The compression is lowered from 9.6:1 to 8.8:1. Also, no the 12 second run wasnt on slicks and it wasnt in a gutted car. You my friend, have an engine problem. Running 10psi daily on pump gas obviously has something to do with it. Apparently you dont understand the Star Fuel system and how it relates to your stock fuel system. Otherwise, you would know better than to do that.

 

i don't want to argue cause I know that there is one problem with my car...I never tuned it.... other then that its fine....with some tuning I know i'd be in the 13 or atleast very low 14's but with no tuning basically stock with just a turbo kit and exhaust hitting a 13.7 I wanna see this video or timeslip cause I dought it was stock.....
It just doesn't make sense because it would be like upping the boost on a GST about 2-3psi and run the same time.....when has a GST ran a 13.7 stock on street tires with only 14-15psi....cause thats basically the same output on our cars with 9psi.
But I just can't see how that is....give me proof and I'll shut the hell up....

 

Um...a 420a on 9psi and a 4G63 running stock boost dont make the same power. A 420a running 4psi makes the EXACT same power as a GS-T. Thats why with only 4psi, a PROPERLY tuned 420a in GOOD running condition will turn 14.7's. They weigh less, and have shorter gearing. Period. There is NO agruement. Your car is messed up dude. 10psi on top of 9.6:1 compression on pump gas has your ECU freaking out and pulling ass loads of timing. Check websites, check 2gnt.com, look at dynos, time slips. There's shitloads of proof. So, what was your agruement again? My point's been made. If you feel the need to argue, please, give Bill Hahn over at Hahn Racecraft a shout. I'm sure he'll email you dozens of dyno sheets, time slips, or just countless stories from his own experience. www.turbosystems.com.

 

Also, if I may. Turning the boost up on a GS-T 3-4psi is not the same as turning up the boost on a 420a powered Eclipse. Why you ask? Its simple. Compression. 2g 4G63 DSM's static compression is 8.5:1, and 7.8:1 for the 1g's. Going from 12-13 to 14-15 on a 4G63 will NOT yield the same power gains as going from 4 psi to 9 psi on a 420a with a 9.6:1 compression ratio. If youre gonna argue, you need some facts dude.

 

Ok, now I don't have a lot of room to add to this conversation, however I am in the process of buying a stage 3 kit from hahn racecraft, and they are calling for 300-325 horse when i apply it to my 420a. Now, I just did a complete overhaul on my motor, it has 83k on it and i will go to the track with a passenger in the car and 200 pounds worth the stereo equipment in the car and run a 15.5, i'm only sitting on around 160-170 horse if that. With bosal header an iceman cold intake and a Matrix exaust. I would have to agree with everything you are saying about the compression differences and the difference in power gain when comparing the two motors. I do know that the compression rate on a stock 420a is higher than the stock 4g or stock turbo cars due to the fact that the 420a is a full bred chrysler motor and the bore/stroke is higher. Actually everything is bigger to make up for the smaller valves. Giving the motor a lot more potential in my opinion. If you don't belive it goto Hahnracecraft.com and see for yourself. While your there check out the massive super turbo kit that gives you 10-30 psi and 4-500 hp.

 

Not to sound stupid and to be annoying -but i guess i am. What is an engine overhaul. same as rebuilding the engine? what is being done to the engine?

 

They have a point, I have the HRC Stage II kit myself. With 3in exhaust, underdrive, and a air tube to the turbo intake for colder air I have a best of 13.54. I usually pour in 1 gallon of 116 octane gas with about 5 gallons of 91 octane to make sure it doesn't detonate on me. Believe me, or don't, but others have said that at the track and it made me enjoy it that much more to see them in my rearview Good luck on your own project.

 

an overhaul is the same as a rebuild, it's just another word for it

 

Why would someone rebuild an engine right before it has to get build again for a stage 3 hahaah.

 

because the rebuild had the pistons, rods, lifters, rockers you know the whole nine. i need to first lower the compression before i can and a turbo kit

 

i have been looking for turbo kits and all of them are for non turbo eclipses which i have....but when looking at installation pics the engines look very different, i reasearched more and i found out my engine config is the same as the turbo enine just sadly with out the turbo....so now i don't know what to do or where to get a turbo kit for my spyder....please help!

also if i can't get this turbo crap done what else could i do to get my car a fast as possible...thanx

--berr08

You're in luck. I just put together a web site for the 4G64 Spyder owners.

http://4G64.150m.com

have a look, and ask questions if you like.

 

Great!!!! finally I see some people opting for the Chrysler bloacks realizing their power potential...now if only 2GNT were alot more popular

 

Great!!!! finally I see some people opting for the Chrysler bloacks realizing their power potential...now if only 2GNT were alot more popular

The 4G64 is not a Chrysler engine. It is a Mitsubishi engine. It is the same casting as the 4G63 engine, just slightly different specs. It came only in the non-turbo Eclipse Spyder (as far as DSM's go).

 

i think he is refering to the 420a motor which is a chrysler motor.

 

Well, this is probably an old post, but look at the time in my sig. When I made this run I was actually only running 3psi, 93octane, stereo, spare tire, 50lb tool box, still in the car. (4psi, race gas, no extra weight should net about 14.5-14.8 in the 420A). Peace...JIM