+1 ^^ exactly what i was getting at. I did this as well on mustang/pinto motors. Just not sure of the physical limits on the 4g63. I try to be careful of what suggest specifically
Have a pic? not sure how that would end up there unless someone had a funny way of balancing. normally they balance by drilling a recess or even adding weight. I have seen some weird things before.
I have to agree with arrowhead. you need all of the compression that you can get. mill the head as much as physically possible(.100 or more). you will definitely need adj. cam gears after doing this. Check to see how much you can deck the block. you want to get as close to zero deck as...
youll want to consider having the big end of the rods resized. This should be done after installing the new rod bolts.....in case it hasnt been done for you already
I don't think you'll have a lot to worry about as far as back pressure. The primary tubes are small enough. I used to run 1 3/4 step down to 1 5/8 primary tube and a 3 inch collector. I made it work but smaller 1 5/8 primaries worked better for some of the other racers.
Another question about placement.....in my old fbody(w/ Lt1) one of the free mods was to relocate the IAT sensor closer to the end of a cold air intake. This was to have better chance of measuring cooler air. I never tried this next one but, some guys even wired in a resistor to trick the ecu...
If you like your setup now, put your car on a set of racing scales and make notes for future reference. This will tell you how much the car weighs, corner weights, and crossweight. Once you lighten the car all of this may change. This allows you to add/ experiment with placing extra weight...
man on my very first n/t talon, at age 16, i dove in and changed the timing belt. no book, no experience on cars...nothing. All i had was the dad of my then girlfriend. This guy was supposed to have experience. Turns out it was just v8s. anyway, I managed to get the job done and got it running...
The buddy of mine that helped get me this job used to say the giggity for everything. He did it so much that we would cringe the next time that we heard it. I just found out that im going back to days after what seems like acouple of years of nights. I know that when i see that dude again, the...
put the car on a diet, if possible, and re-scale it. add some cam gears and track tune the timing there. If you decide to.... shed all of the rotational mass that you can. i.e. crankshaft weights or just knife edge, lighter rods and pistons, balance shafts removed, lighten the valvetrain...
dont expect too much from kinugawa. This is a just in case they send you the wrong thing. I recently had a small incident with them. They sent me the wrong compressor cover. It was a beautiful piece, but wasnt the cover that i had ordered. customer service was ok and they did attempt to make...
If you end up removing the head again, you could check for your leaks by spraying the combustion chambers with soapy water and blowing compressed air up the runners. Sometimes the water in the chamber trick takes a while before a leak will seep through. Just another trick...
Aside from looking...
hold on man. I obviously know a miniscule amount compared to the guys who have been around the block. Im definitely scrolling through to learn as much as I can. The science isnt the half of it. If I dont know..ill ask. If i Think that i can add something without spreading misinformation, I will...
so..I get the arguements here, but at what point do you decide to just recommend size by purpose? I.e. street, drag, rally, roadrace, etc. I mean isnt that what we do when someone asks about engine building? I wouldnt disagree that bigger is better. However, Im believer of the fact there is...
what i meant was to shape the mound, around the valve guide, with a burr. In many of the heads that i have ported, I have shaped that area in effort to create more of a valley to flow through and around as opposed to a mound to tumble around. I realize that much of the air will try to flatten...
some consideration can be taken into having the valves unshrouded, (modifying the area in the combustion chamber, around the valves) when switching to oversized valves. As it will affect the size of the chamber This isnt favorable for guys who are looking the most compression possible.
Ive been having a similar problem with my 13g. Boost is sometimes intermittent. Have done blts and a smoke test for grins. Some of the suggestions on this thread gave me another idea. I didnt have the sea foam but i did have some ATF. I pulled the pcv hose and sucked up the tranny fluid through...
+1 ^^^ on his comments. much attention will go into the bowl areas, short side turn, and combustion chambers. After the oversized valves are cut in, you may want to back sure that you dont need to blend in any the machining material left by the bore hog. May not be anything to worry about with...
so...I read where you installed the backpressure guage. Im wondering, how do you feel about your findings on that? A while back I saw someone talking about the construction/ installation of backpressure guage. I cant remember where I noticed it, but could you benefit from a larger housing? I...
Any body know if the exhaust manifold from a 3g eclipse would bolt up to a 4g63 head? I was at the junk yard today and noticed that the 3g manifold has tubular primaries and its actually a 4-2-1 design. If this would work, its the closest thing to headers while still being stock manifold
I did a similar thing on one my old cars. never noticed any wobble but i got the squealing. When i finally took it out to inspect/replace, i noticed that squealing was from the impeller rubbing on a cylinder. The impeller machined a nice sized flat spot. Good luck
Can the harness be found in a dodge stealth? I was at the local pick-n-pull today where all that they had was a stealth r/t. I skimmed through the extreme website without any luck. I just might call them for that part. 15 dollars is cheaper than driving around looking for a 3000gt.
a way to tune would definitely be something. You would be surprised what kind of power you can unlock from a some good head work and the right cams. dont forget adjustable cam gears to tune with also. ultimately its about combination and setup. Ive seen plenty of racers with stroked motors get...
If im not mistaken about 1 point...rule of thumb was every .040 raises compression 1 point. Something i learned and used in my roundy round days.
Check out what bogus has covered...in case you havent already...
I contacted extreme last night with the question that jlog originally posted. In response they acknowledged that they previously offered those cams for moderns advertised price. Due to price increases from BC, extreme had to adjust accordingly. The rep gave me his guess as to possibly why...
most of the time if a rod bearing is spun, and the rod gets reused, it has to be resized. You might be able to get away without it, but after resizing the rods should be rebalanced.
Depending on your budget, you can do FP as suggested above. I believe i saw that they posted a sale recently. Or, you could keep an eye on the classifieds here. You can get an actuator on the classifieds, ebay or you could contact jusmx141 and pj91gsx for some possibilities.
so... after test driving we noticed that it was taking forever to spool up. Did a BLT. Found a couple of boost leaks and addressed. Checked for shaft play while we were in there. no play there. I finally talk my buddy into getting a timing gun. We get the timing set 5* BTDC. In case I havent...
depends on what sound you are after. Right? Ive heard some good sounding isobaric enclosures. but, isobaric is a sound quality kind of enclosure. If i remember correctly, while requiring less space, it yields a loss of 3dB. Then you have the sealed box, still fits ok but you probably want to...
+1^^^ As long as the surface isnt too thin and its been milled straight. All that happens is eventually compression can increase depending on much keeps being milled. If I remember correctly it takes removing approx. .040 of material to raise compression "1 point." obviously you dont want alot...
if youve already done it, i havent noticed. Are there any plans to put a firewall back in? Im not going to jump on the back wagon but, maybe you should reconsider some of the bracing in your design. I understand you have to start somewhere, but If that chassis is twisted already.. it probably...
corollas and hondas made the top 10 list that i saw a couple of weeks ago. most well known alarms have some kind of kill switch whether it be a fuel pump or starter kill. I would do a seperate kill switch. not sure if theres much truth to it, but Ive heard of savvy thieves being able to bypass...
to check for blown capacitors youll need to remove the ecu. If you dont already know, the ecu is behind the radio in the center console area. Once you have the ecu out, remove the cover and inspect the board for leakage or burns around the capacitors.example:
just because im curious too, i would like to know. Its been a while since reading, but i could swear that i read a thread that recommended 75psi max for holset?
Update: got the coils swapped out. Ran better but still missing. Found spark in all four. Stepped away and while I was gone my buddy freaked out and pulled the vc to look for bent valves. Everything good there. Figured #2 injector wasn't working. Swapped with another one just to make sure...
I figured it out. the wix filter that the p.o. had in had kind of a large gasket and wasn't seated correctly. I attempted to replace the filter with a duralast from autozone. After fighting with it for a couple of days I finally pulled it out and compared it to the wix filter that I threw away...
well if you zero deck the pistons wouldn't be sticking out, they would be flush. you would have to mic the distance between the deck and the piston top to see if its even worth doing. If you start raising compression youll need to start increasing octane. I used to get away with 110 up to 116...
I can always/should go to the appropriately dedicated forums, I just want to know a fellow tuners opinion. I just acquired a 95 f350 with the 7.3 turbo diesel. Im having trouble with a leaky fuel filter that i just replaced. The one that was in there previously, was also leaking. Anyway, what...
I just remembered something. Back in the day people started using the crank from a 2.5L chrysler four cylinder to build a dsm stroker. I cant remember the details but im sure you could find them as fast as I could. Not to throw anyone out there, I seem to remember Buschur being one of the guys...
+1 ^^^ cams, a little bowl work if you get the chance, and def need to raise compression. I used to dirt race mustangs/pintos. Im not sure if you can use some of the tricks that ive done but ill cough some ideas. I had better luck with lower lift longer duration cams (300 to 310 degrees was my...