stock shortblock+E85; how much timing?
stock shortblock+E85; how much timing? Getting my car tuned on Saturday and im looking to see what people have successfully run on on stock shortblocks.
The fuel has tested to 85% so thats what ill be on.
My biggest issue is im on stock headbolts, so i really want to know what i can realistically run without lifting them. (I8UR4RD lifted them at ~9psi/22* on pump/meth, so that kind of has me worried)
So far ive told my tuner i dont really want to go past 8-10psi/14-16*
Is that pretty safe on E85?
The fuel has tested to 85% so thats what ill be on.
My biggest issue is im on stock headbolts, so i really want to know what i can realistically run without lifting them. (I8UR4RD lifted them at ~9psi/22* on pump/meth, so that kind of has me worried)
So far ive told my tuner i dont really want to go past 8-10psi/14-16*
Is that pretty safe on E85?
yeah see thats where im stuck, idk how far to push it on stock head bolts right now.. Ill be putting in studs and ls9s once i get back from internship in august for sure though. im really gonna try and push this shortblock on E85 after that..
The numbers you spoke of earlier will be more then fine.
FormerVendor
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There are quite a few more factors than just max timing. Does your tuner have experience tuning E85 in LSx engines? If not, give me a call at the shop tomorrow and I'd be more than happy to go over a few things with you. (phone # in sig)
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For me it has been around 15-16 psi, and 17~18* where they start to push. 12psi, and 16* should be pretty safe. A lot depends on condition of the bolts the older they get the less clamping force they provide.
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Verdad Gallardo My car is just about to hit 50k, but im not sure if the previous owner ever removed the heads. Thank you for the info!
Not that I am aware of.
There was some information regarding this elsewhere but it wasn't accurate.
Read them like a normal plug. It is hard to judge the fuel ring on a E85 fueled car because it burns very clean.
You have to watch the heat on the strap of the plug mainly to judge rich, lean, over or under timed.
I will say this. Adding timing and adding timing you can get carried away quickly and hurt parts, lift heads etc. because you are adding cylinder pressure without a way to judge it really.
If I were you I would leave the timing alone, OR even retard it some and run more boost.
There was some information regarding this elsewhere but it wasn't accurate.
Read them like a normal plug. It is hard to judge the fuel ring on a E85 fueled car because it burns very clean.
You have to watch the heat on the strap of the plug mainly to judge rich, lean, over or under timed.
I will say this. Adding timing and adding timing you can get carried away quickly and hurt parts, lift heads etc. because you are adding cylinder pressure without a way to judge it really.
If I were you I would leave the timing alone, OR even retard it some and run more boost.
Not that I am aware of.
There was some information regarding this elsewhere but it wasn't accurate.
Read them like a normal plug. It is hard to judge the fuel ring on a E85 fueled car because it burns very clean.
You have to watch the heat on the strap of the plug mainly to judge rich, lean, over or under timed.
I will say this. Adding timing and adding timing you can get carried away quickly and hurt parts, lift heads etc. because you are adding cylinder pressure without a way to judge it really.
If I were you I would leave the timing alone, OR even retard it some and run more boost.
There was some information regarding this elsewhere but it wasn't accurate.
Read them like a normal plug. It is hard to judge the fuel ring on a E85 fueled car because it burns very clean.
You have to watch the heat on the strap of the plug mainly to judge rich, lean, over or under timed.
I will say this. Adding timing and adding timing you can get carried away quickly and hurt parts, lift heads etc. because you are adding cylinder pressure without a way to judge it really.
If I were you I would leave the timing alone, OR even retard it some and run more boost.
And i was planning on the low timing/more boost to get what i want.
this is just an after thought, but do you normally see more of an increase in cylinder pressure from raising the boost by a lb or by raising the timing by a degree?
