Highest HP 4g63 engine (from 2007)
#1067
Evolved Member
iTrader: (6)
Join Date: Sep 2005
Location: NYC
Posts: 2,269
Likes: 0
Received 0 Likes
on
0 Posts
Mitsu has proved that it's good for almost 1000awhp and dead low 9 sec passes or even 8 sec passes if I am not mistaken... These numbers will cover 99% of the Mitsu owners... And most importantly it already came with the car! No additional funds required!
#1069
Evolved Member
iTrader: (8)
I don't see any of the cranks with half the counterweights removed? What's your thoughts on those, Spyros?
For example,
http://www.winbergcrankshafts.com/pdf/evo.pdf
Also, the work done on that head is awesome. Is that head going to be an actual finished product or is that being used for development purposes on the flowbench only?
#1071
Evolved Member
iTrader: (6)
Join Date: Sep 2005
Location: NYC
Posts: 2,269
Likes: 0
Received 0 Likes
on
0 Posts
I don't think anybody pushs the stock cranks that hard without additional balancing. As far as strength though, it's pretty robust.
I don't see any of the cranks with half the counterweights removed? What's your thoughts on those, Spyros?
For example,
http://www.winbergcrankshafts.com/pdf/evo.pdf
Also, the work done on that head is awesome. Is that head going to be an actual finished product or is that being used for development purposes on the flowbench only?
I don't see any of the cranks with half the counterweights removed? What's your thoughts on those, Spyros?
For example,
http://www.winbergcrankshafts.com/pdf/evo.pdf
Also, the work done on that head is awesome. Is that head going to be an actual finished product or is that being used for development purposes on the flowbench only?
Spyros,
it ould be great to show a table with results for all the cranks you have... This would be the easiest way to interpret the results.
#1073
Evolved Member
iTrader: (30)
With the exception of the long stroke crankshafts, the stock 88mm Mitsu crank doesnt have issues till 1100+whp and 11k. Even then all we have ever seen is micro fractures and that isnt a result of the balance. Maybe we just have a knack for finding good cranks, but if that was the case I'd rather use that luck on the lottery.
#1074
Evolved Member
iTrader: (7)
Been checked multiple times with the same results, something like >0.5g at 9k...might have been 8k. I will have to ask the machinist that checked it for us.
With the exception of the long stroke crankshafts, the stock 88mm Mitsu crank doesnt have issues till 1100+whp and 11k. Even then all we have ever seen is micro fractures and that isnt a result of the balance. Maybe we just have a knack for finding good cranks, but if that was the case I'd rather use that luck on the lottery.
With the exception of the long stroke crankshafts, the stock 88mm Mitsu crank doesnt have issues till 1100+whp and 11k. Even then all we have ever seen is micro fractures and that isnt a result of the balance. Maybe we just have a knack for finding good cranks, but if that was the case I'd rather use that luck on the lottery.
#1077
You all have to remember that the 14000rpm that he talks about is not that they spin it to 14000rpm and measure the unbalance! The spin is done at about 500 rpm as usual, then the amount of unbalance is calculated like if the crankshaft was run at 14000rpm.
Spyros, the epoxy you have in the exhaust, I do not think that stays there for a long time? Is i Belzona, what number?
/Andre'
Spyros, the epoxy you have in the exhaust, I do not think that stays there for a long time? Is i Belzona, what number?
/Andre'
#1078
I also asked this earlier Andre. I've tried many epoxies and never found one will stay in exhaust port. Spyros, please let us know which you use.
#1080
I tig weld the exhaust ports to the shape i require but its a lot of work that would be much easier done with epoxy and also its not always possible to tig every area due to size of port vs tig torch, so an epoxy solution would be very interesting.