Blown piston and damaged block
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
That is detonation damage on the piston. Probably not the fuel's fault. But how you were driving. You need to inform your tuner that you plan doing very long and extended WOT runs on the freeway like that. Things need to be changed in the tune to accommodate the heat soak everything is going to experience to prevent engine damage. Richer AFR's, less aggressive timing, etc.
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
My mechanic is telling me we can clean the block 0.020 over and just use AMS 0.020 over pistons and rods instead of buying an assembled shortblock.
Is it ok to over to do that to the Evo aluminum block?
Is it ok to over to do that to the Evo aluminum block?
OEM
NGK ILKR8E6 (earlier)
NGK DILKR8B6 (later)
Upgrades
NGK Racing R2556B-9
NGK Racing R2556B-8
HKS M45XL (heat range 9)
HKS M40XL (heat range 8)
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
My car is alive again and doing well so far. I did 200 miles yesterday to break it in. I will take it for a retune with the snow performance methanol injection next weekend after completing at least 600miles.
I love the Gauge pod, fit and finish feel original and now i can actually see what my car is doing. Wish i got oil pressure instead of the boost gauge as Snow Performance provides a boost reading as well.
I love the Gauge pod, fit and finish feel original and now i can actually see what my car is doing. Wish i got oil pressure instead of the boost gauge as Snow Performance provides a boost reading as well.
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
Update:
Thanks to Chris he sent me a tune for a hi-map using 91 octane with methanol set to start at 12psi and spray full at 18psi. I did multiple logs today and i have reached 30psi at 3800rpm and dropped to 18psi at 8000RPM. Car felt strong but i need to dyno to see what im putting down now.
One interesting observation about the snow performance stage 2, it dropped IAT from 104f to 69f going from 2nd to 4th gear. In 2nd gear i have seen up to 2-3 knock sum but when manifold temps dropped below 96f it was zero knock all the way to 69f. Ambient temps were around 86f and i was running the hi map 30psi peak here.
I did another log with no methanol and low map which peaks around 25psi, manifold temps went up to 107f and it held steady at that temp from 2nd to 4th. Im running AMS intercooler.
Thanks to Chris he sent me a tune for a hi-map using 91 octane with methanol set to start at 12psi and spray full at 18psi. I did multiple logs today and i have reached 30psi at 3800rpm and dropped to 18psi at 8000RPM. Car felt strong but i need to dyno to see what im putting down now.
One interesting observation about the snow performance stage 2, it dropped IAT from 104f to 69f going from 2nd to 4th gear. In 2nd gear i have seen up to 2-3 knock sum but when manifold temps dropped below 96f it was zero knock all the way to 69f. Ambient temps were around 86f and i was running the hi map 30psi peak here.
I did another log with no methanol and low map which peaks around 25psi, manifold temps went up to 107f and it held steady at that temp from 2nd to 4th. Im running AMS intercooler.
Newbie
Joined: Oct 2016
Posts: 7
Likes: 1
From: Highland Park, IL
Update:
Thanks to Chris he sent me a tune for a hi-map using 91 octane with methanol set to start at 12psi and spray full at 18psi. I did multiple logs today and i have reached 30psi at 3800rpm and dropped to 18psi at 8000RPM. Car felt strong but i need to dyno to see what im putting down now.
One interesting observation about the snow performance stage 2, it dropped IAT from 104f to 69f going from 2nd to 4th gear. In 2nd gear i have seen up to 2-3 knock sum but when manifold temps dropped below 96f it was zero knock all the way to 69f. Ambient temps were around 86f and i was running the hi map 30psi peak here.
I did another log with no methanol and low map which peaks around 25psi, manifold temps went up to 107f and it held steady at that temp from 2nd to 4th. Im running AMS intercooler.
Thanks to Chris he sent me a tune for a hi-map using 91 octane with methanol set to start at 12psi and spray full at 18psi. I did multiple logs today and i have reached 30psi at 3800rpm and dropped to 18psi at 8000RPM. Car felt strong but i need to dyno to see what im putting down now.
One interesting observation about the snow performance stage 2, it dropped IAT from 104f to 69f going from 2nd to 4th gear. In 2nd gear i have seen up to 2-3 knock sum but when manifold temps dropped below 96f it was zero knock all the way to 69f. Ambient temps were around 86f and i was running the hi map 30psi peak here.
I did another log with no methanol and low map which peaks around 25psi, manifold temps went up to 107f and it held steady at that temp from 2nd to 4th. Im running AMS intercooler.
Thread Starter
Evolving Member
Joined: Sep 2002
Posts: 196
Likes: 5
From: KSA
Newbie
Joined: Jan 2015
Posts: 5
Likes: 0
From: Fayetteville, NC
Blown a hole in my engine... need some advice..
:h elpme:I am researching and wanting to know if any of you have built a 4b11t. I have a friend that has a whole engine that I am getting his engine from and it has a little bit of marks in the cylinder from a piston ring scratching it. So my questions are as follows.
As I understand that the OEM bore and stroke is 86mm by 86 mm, what is the biggest bore you can give these engines?
If I plan on just going to 88mm by 88mm, what would be my liter size?
What do you think is the best rods to use in a 1000hp build?
If I plan on building the bottom in so much what upgrades would I need on the top in?
I have a lot of questions but let see what answers I get back on this first.
Jason