yeti-gvr4
10+ Year Contributor
- 422
- 2
- Dec 23, 2010
-
san diego,
California
is this better than a stock rebuilt 4g63
?!?
?!?
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I have a 91 Plymouth Laser RS 2.0L N/T JDM engine. This car has been gutted out. 6 point cage installed. Window/glass lights and all street trim removed. No emissions on engine. The Haed was shaved just shy of it's maximum tolerance to help boost compression. The JDM engine has larger cams equiv to the 240 cams. I am estimating around 135 hp and 130 fp of torque. I run 185-60-14 DOT tires. This car is raced on a 3/10's oval race track. With a claim rule of $900. I built the car 3 years ago with $1,100. Just have maintained it and only replace parts as they break. The RPM range used is 4200 rpm in the corners and 6100 rpm by the end of the straights. Here is my problem. I am running against 160 +hp cars with larger engines and greater torque. I do pretty good out driving most of them if I don't make a mistake. My torque peak is at 4500 rpm so droping to 4200 rpm really bogs the car. If I lift for any reason I get passed. I have taken 3rd in points on the season 2 years running. This year I want a championship.
Question 1: Is there a Trans with a lower 3rd gear or diff gear that will help keep RPM's around 5000? I have the smallest tire I can find and run for 3rd. Bigger and 2nd doen't work, rpm's hit 7500 with 205's. Not making power.
Question 2: Is there a very low cost stroker due to the $900 claim rule I can put together To boost and widen my torque curve? Would like to get up to 160 Foot lbs.
Question 3: Is there any mods I can do to the 4G63 Engine to help get up to 160 F/lbs? Our class doesn't allow mods much so they need to be kept to a minimum. Most cars on the track are illegally modified hence the 3rd in points twice and cant get any better. And yes I can drive.
Question 4: If I can do a 2.3L 4G63, Will the Fuel, electronics, sensors and ecu be addiquate ti run such an engine?
I am going to pull the engine and so far my plans are to re-build it. I will bore it 0.040 (65mm), remove the balance shafts (kit) and am going to have the whole rotating assembly Balaced. I am just not sure this will be enough to get me to 160flbs? I am very smooth, quick and totally count on my driving. I need more engine/power so that I can lean on the car a little more and not worry about how to get rpm's back up if I should make a mistake. I am very machaniclly inclined. ASE certified and do Allot of performance builds of mostly domestic engines. This is the first car I have ever raced with a 4 cyl in it and the least amount of power I have been behind. So I do not know what mods, tricks or parts are out there for them. I am very frustrated to do so well and only to be beaten out by cheater (hopped up) cars. Any and all tips and knowlage would be great.
Please help me with this prob. And keep in mind This has to be low budget. I am working on getting a few more sponsors but is difficult. I get attention when I tell them It's a tax wright off, but then most back out anyway. Thanks for the time.
I was trying to do a new post, not a reply. I ment no disrespect. Not sure how to move it. Again I am sorry.
is this better than a stock rebuilt 4g63
?!?
First off if you were mechanically inclined and ASE certified you would know that increasing power and torque on a 4cyl is no different than increasing power and torque on a v8 or any other configuration. A 4cyl runs on the same concepts that any other engine does, you will not be able to increase power and torque without A-increasing displacement/compression B-more rpm's C-more airflow D-some kind of power adder.
With that said i will attempt to answer your questions
Q1. Jacks Transmissions builds DSM trans with i believe evo3 5th gears?? could be a different evo gear im not really sure which one?!!? anyways its a TALLER evo gear for better gas mileage, i am guessing if he could do that he could also do other gears also.
Q2. yes i know there is a way to use the 4g64 block or the 4g64 crank to increase your displacement to a 2.4 but you will have to research more to be sure, but if theres a 900 claim rule are they really gonna take apart your engine to make sure you did not spend more than 900 on pistons and rods etc?
Q3.i already answered
Q4.if your gonna run a 2.3 n/a your ecu, injectors etc etc will be fine.
One more thing, if you are having issues with being out of the power band while racing, you can shift the torque/power curve and the peak torque higher or lower in the rpms with adjustable cam gears or different cams, you would think being ASE cert and doing a lot of performance builds you would know that?!?!
2.4. = bigger then 2.3/2.0 meaning more stroke always.
In the end, a 2.4 is always better.
2.3/2.0 is what I would like to do and is the only "real" way of increasing torque. For someone who has been through this. What costs are we talking about? Any leads on Good used parts? Low cost new parts? Discounted parts stores? My app is Non-turbo and looking only to build around 160-170 ft/lbs of torque, so I am not needing anything forged or on the killer side of high performance. RPM's are fairly low, 6100 Max. More stroke would help lower my torque peak with the same cams I am already running and increase torque figures.
OOOOOoOoOoO He told you ! But seriously this is supposed to be about which is better not who knows the most. OP 2.4 is better
if you want to purchase a new 2.3 kit its gonna run around $2000+ so i am assuming that is out of the question.
There is a couple ways to make a very cheap stroker kit. One would be to use the 4g64 block and rotating assembly with your 4g63 head that will give you a 2.4L . Another option is to put a 4g63 crank into a 4g64 block and that will give you a 2.2 or a 2.1L i am not sure.
There are many tech articles and posts on the matter of 2.4L strokers that will give you every detail you want to know ..... all you have to do is use the search button
better yet here you go i did it for you
http://www.dsmtuners.com/forums/420...-put-4g63-dohc-head-into-4g64-sohc-block.html
http://www.dsmtuners.com/forums/newbie-forum/354522-4g64-2-4l-turbo-sohc-swap-dohc.html
http://www.dsmtuners.com/forums/newbie-forum/388318-2-0-vs-2-4l.html
More displacement is always better. There's alot of misconception in the domestic world because motors like the 383 stroker. I cringe when people take a good running 400 and take the crank out and toss the block. 383 vs 400 - Help for your Chevy - Community Forums our blocks and cranks are all the same material/design.
Does your car have power steering? you may be able to switch to manual rack(some cars came stock with them) and reduce some draw on the engine. depends on how much sawing at the wheel you are doing though, you'll have to turn the steering wheel a bit more to get the wheels to turn as much.
What's sawing? Like jerking the wheel? I'm guessing that's a racer term cause you shouldnt be jerking a wheel dd ever right .
2.4 is always a better platform in my opinion and most evo guys swear by it. The mods are cheap and the torque is there. More stroke.