What kind of PSI stock can you max out at on a stock J30A1? 2000 Accord V6. Thanks.

 

bump

 

Well technically the max amount you could boost a stock block can take would be the amount right before the rod flys through the side of your block :p . lol, anyway most honda 4-cyl are pretty boost tolerant, and are generally good to around 6-8 PSI daily on a good tune, but the life of the engine will most likely be shortened. The J30A1 V6 accord engines, however, are not commonly modified, or boosted, for that matter but I know turbo kits are available for them.

As a ball-park guess i would reccomond not going over about 5 PSI. You will still get a decent increase in power- but on a stock block (especially a V6) you can only push them so far. With a good modified ECU and a tune you might be able to get up to around 8PSI, but like I said before if it doesnt spectacularily and instantly fail, your engine may run fine for a while but the overall life expectancy of the engine will go down on any amount of boost. You can also search around to see if anyone on honda-tech or anywhere else online has a boosted stock J30A1, and see what they run daily and their results. Anyway good luck!

 

it really depends on what ur running SC or turbo......
if running a turbo it depends on the size of it some turbos need more psi then others....
me personally i would stay around 8-9 with a good size turbo (t3/t4)
with a SC i would leave wit the way it is and run the psi that it is set up for!
and also U def need to get a good Tune that will help a GREAT DEAL!!!!

 

Well if he's going to boost it with a turbo (im assuming he would as superchargers are extremely expensive for hondas and hes keeping the cost down by boosting a stock block) its assumed that he gets the right turbo in the first place. As far as saying he should run the supercharger with whatever it puts out is rediculous- Boost is boost no matter what it comes from and too much can destroy a block. Although MOST superchargers for honda applications arent very high boost as is, they still pack quite a punch but again I believe a supercharger is out of his price range...(if they even make a supercharger for the V6 accords).

As with any project that involves boost, a good tune is always neccesary. Having forged internals is a great safety net for running higher boost and HP levels, and of course if you have forged internals, your most likely planning for more than 8lbs of boost anyway. But i dont believe there are any direct fit forged internals for the J30A1 anyway, i could be wrong, but on a stocker you just need to be carefull and not get carried away.

 

Ugh.

"PSI of boost" is a meaningless figure without listing the turbo. 8 pounds per square inch with a T25 is completely different from 8 pounds per square inch with a T88. One is going to be completely safe with the proper tune; the other is going to blow your engine to smithereens.

Horsepower is a much better figure to work with.

Either way, the J30A1 engine isn't what you should be worried about, as the weakest point of the drivetrain is going to be the notoriously fragile 4-speed automatic transmission attached to it. It can't even hold up to the stock 200 horsepower; if I owned one, I'd be detuning it rather than boosting it.

 

uhm, the HP rating has NOTHING to do with why the automatics fail in these cars. The reason for failure is purely design and quality of materials related and are easily solvable as the new honda reman units no longer fail for the reasons listed below.

failure point #1: Differential bearings
reason: substandard bearings (quality control issues)
resolution: install better differential bearings

failure point #2: 2nd gear clutch pack insufficient lubrication
reason: honda screwed the pooch on the design
resolution: remove internal screen type filter and install an external inline filter /w bypass to prevent lack of lubrication. In addition, increase oiling capacity for 2nd gear (new housings do this)

Failure point #3: 2nd gear shaft overheat
reason: you guessed it, honda screwed the pooch on the design yet again
resolution: install oil jet kit on older (read original transmissions). oil jet kit is internal to the replacement rebuilt units made after about Feb '05