View Poll Results: What motor will hold the most power on the stock shortblock?
4g63
86
94.51%
ej257
4
4.40%
too close to call
1
1.10%
Voters: 91. You may not vote on this poll
What motor will hold more power on the stock block?
#1
Evolving Member
Thread Starter
Join Date: Dec 2003
Location: FL
Posts: 438
Likes: 0
Received 0 Likes
on
0 Posts
What motor will hold more power on the stock block?
What motor (4g63 vs. ej257) will prove to hold more power on the stock shortblock. Also, please back up your answer with facts or reasoning. I will also post this over at clubwrx.net. It will be interesting to see the outcome from two different perspectives.
(my opinion- both will hold about 450 whp)
(my opinion- both will hold about 450 whp)
#2
Evolved Member
iTrader: (17)
Join Date: May 2003
Location: Flemington, NJ
Posts: 2,850
Likes: 0
Received 0 Likes
on
0 Posts
the AMS EVO 8 put down 530 on the stock block. i think that even though both engines might have a similar threshold, it is much easier to get that kind of power out of the 4g63 because you can't boost the ej25 higher than 15 pounds
#3
JUN who has been tuning both ej20's and and 4g63's alway had higher power on the Mitsubishi powered cars. If anything, the maximum horsepower ptential for the ej257 is probably slightly less than for the ej20 in a turbo application as it is going top be slightly less rigid because of bigger holes and less potential for rpm.
#4
Originally posted by Rez90
the AMS EVO 8 put down 530 on the stock block. i think that even though both engines might have a similar threshold, it is much easier to get that kind of power out of the 4g63 because you can't boost the ej25 higher than 15 pounds
the AMS EVO 8 put down 530 on the stock block. i think that even though both engines might have a similar threshold, it is much easier to get that kind of power out of the 4g63 because you can't boost the ej25 higher than 15 pounds
#5
Evolving Member
Thread Starter
Join Date: Dec 2003
Location: FL
Posts: 438
Likes: 0
Received 0 Likes
on
0 Posts
God from Godspeed racing says he thinks the sti block will support up to 450 hp reliably. He said they should start to break at about 500whp. Just keep that in mind.
#6
Originally posted by bluevilevo8
God from Godspeed racing says he thinks the sti block will support up to 450 hp reliably. He said they should start to break at about 500whp. Just keep that in mind.
God from Godspeed racing says he thinks the sti block will support up to 450 hp reliably. He said they should start to break at about 500whp. Just keep that in mind.
Trending Topics
#8
EvoM Staff Alumni
iTrader: (66)
There are a wad of dynos of "stock block" 500+whp 4g63s on the DSM boards due to very careful tuning... and I'm not talking of one run wonders. I don't think there are nearly as many stockers holding together at over 500 in the Scooby camp. Now don't get me wrong at all, I'm thinking an STI would look real good with my wife in it... sharing the garage next to the EVO. I just can't convince her that it is not ugly
#9
Originally posted by bluevilevo8
So far the ej257 is winning over at clubwrx
So far the ej257 is winning over at clubwrx
#10
Evolving Member
Thread Starter
Join Date: Dec 2003
Location: FL
Posts: 438
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by MP5
It took me a long time to get out of that Subie underdog mentality also. I can see only one of them has the ***** to put it to the test
It took me a long time to get out of that Subie underdog mentality also. I can see only one of them has the ***** to put it to the test
#12
Evolving Member
Thread Starter
Join Date: Dec 2003
Location: FL
Posts: 438
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by CLeeEvo
Call me Mr. Obvious, but in either forums, I think the answers you'll get will be biased opinions rather than facts.
Call me Mr. Obvious, but in either forums, I think the answers you'll get will be biased opinions rather than facts.
#13
In our experience the 4g63 is almost unrivaled in the "stock block" hp holding capacity race, at least for a 4 cyl. We are now 500 dyno pulls into our car, and at least 1/3 of those are above 480 whp with 50-75 at or above the 525 whp mark. Leakdown at this point is right around 2-3% for all 4 cyl, which is better than alot of new cars in the last few years.
-kris
-kris
#14
Evolving Member
Thread Starter
Join Date: Dec 2003
Location: FL
Posts: 438
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by boiwunder
In our experience the 4g63 is almost unrivaled in the "stock block" hp holding capacity race, at least for a 4 cyl. We are now 500 dyno pulls into our car, and at least 1/3 of those are above 480 whp with 50-75 at or above the 525 whp mark. Leakdown at this point is right around 2-3% for all 4 cyl, which is better than alot of new cars in the last few years.
-kris
In our experience the 4g63 is almost unrivaled in the "stock block" hp holding capacity race, at least for a 4 cyl. We are now 500 dyno pulls into our car, and at least 1/3 of those are above 480 whp with 50-75 at or above the 525 whp mark. Leakdown at this point is right around 2-3% for all 4 cyl, which is better than alot of new cars in the last few years.
-kris
thats the kind of response I was looking for.
BTW, on what dyno were these pulls made on, and what have you done to the head?
#15
Evolved Member
Join Date: Jun 2003
Location: Nothern CA
Posts: 697
Likes: 0
Received 0 Likes
on
0 Posts
You asked about block; at the myevo site there is a Swede who is pulling 710HP from the mitsu.. The Evo head allows more boost than the Sub before pre-ignition, the mitsu rolling assembly is proven to support over 400HP. The way the engine is tunned will determine what fails first. RPM and cylinder pressure must both be considered as they will cause different failure points like piston collapse, rod collapse, rod cap faliure. The cast pistons are light and well designed but poreous. For this reasn they may be the weak link as the steel crank peened rods seem solid and stout for stock units. Assuming no detonation, the crank should reach bending moment before shear at high rpm (dynamic load) or from pressure (static loading). The rods should bend before the caps or bolts fracture under pressure but the revese should occur it the engine is reved beyond limits. The absolute values can be calculated using strength of matterials and mass (static and dynamic) parameters for both engines being compared. Hope this helps. Evo wins the head design comparison and that is proven by the boost it can support. I believe the head is the key to making power so I bought what I bought.
Last edited by WildRice; Jan 14, 2004 at 09:47 AM.