High compression and Boost question
High compression and Boost question I got a H/C LS1 GTO currently 11:1 compression, and Im installing a Maggie 112 HH next weekend. My tuner and I talked about risks associated with high compression, just want to here what kind of personal experiences and knowledge others have with this situation.
I was referred to you guys by my tuner a a head gasket question. Currently got an LS1 with Trickflow 215 heads/ mild cam and am adding a maggie 112 HH supercharger. My current compression ratio is 11.0:1 and my tuner recommends a thicker/larger bore head gasket. Ive seen cometics and was wondering what a good thickness/ bore would be.
Of course Id like new dished pistons, but that will be this winter.
Thanks!
Of course Id like new dished pistons, but that will be this winter.
Thanks!
If you can get E85 locally, keep the motor the way it is and run it! It would be awesome with the blower and that compression.
If you can't get E85, I would ditch the heads in favor of something with a larger chamber rather than just changing head gaskets. Most people here run standard GM MLS gaskets with very good success. I would run the GM LS9 gasket.
If you can't get E85, I would ditch the heads in favor of something with a larger chamber rather than just changing head gaskets. Most people here run standard GM MLS gaskets with very good success. I would run the GM LS9 gasket.
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Im not really familiar with e85, so are there any requirements to run it on an LS1 like different fuel system upgrades etc? Im ordering a meth kit so I figured that would be just as good as e 85 but experts feel free to chime in on whats better.
I have trickflow 215's now, since I was all NA on my initial build, but still have the stock 241s.
I have trickflow 215's now, since I was all NA on my initial build, but still have the stock 241s.
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Verdad Gallardo E85 requires about 30% more injector and better fuel pumps and perhaps larger lines. I'm making over 700rwhp on twin Walbros and 1680cc injectors.
E85 is different from meth. You don't have to worry about a meth system dying on you and it just simply does not knock. You will bend a rod before it knocks. It's good stuff.
The only negatives to E85 are availability, the increased need for fuel flow, and that it requires tuning on a dyno so that you can see where you're gaining or losing power since it won't knock.
You could put the stock 241s back on as well and run gas. What the chamber size on the TFS heads?
E85 is different from meth. You don't have to worry about a meth system dying on you and it just simply does not knock. You will bend a rod before it knocks. It's good stuff.
The only negatives to E85 are availability, the increased need for fuel flow, and that it requires tuning on a dyno so that you can see where you're gaining or losing power since it won't knock.
You could put the stock 241s back on as well and run gas. What the chamber size on the TFS heads?
It's important to note that you aren't just doing high compression and boost. You are doing high compression, stock pistons, and a roots blower. That's a recipe for disaster IMO. The stock pistons have no tolerance for detonation and the roots blower makes an excellent air heater.
Well you've already seen the disaster of the other thread on LS1gto with mr clueless chiming in about how he would run it at 13:1 a/f ratio with low timing, etc.
I will say here that I would personally change out the heads to a big chamber version of something to drop your compression ratio with that old blower and it's high intake air temp charge for pump gas. Running a thicker head gasket is not the correct solution in my opinion.
I much prefer E85 to a meth injection kit as it's one less system that can fail and E85 will take you a lot further as well. If it's available to you and you beef up your fuel system some it would be your best bet and you can run that higher compression without worry.
I will say here that I would personally change out the heads to a big chamber version of something to drop your compression ratio with that old blower and it's high intake air temp charge for pump gas. Running a thicker head gasket is not the correct solution in my opinion.
I much prefer E85 to a meth injection kit as it's one less system that can fail and E85 will take you a lot further as well. If it's available to you and you beef up your fuel system some it would be your best bet and you can run that higher compression without worry.
TFS Chamber is 64 cc. Until I can afford to swap out the bottom end with dished pistons maybe I should swap my TFS 215"s for a cheaper set of larger cc used heads. Any recommendations?
We do have E 85 but Im still leaning toward the meth kit since Its not close to the house. 317's are sounding pretty good with the more research I do. I wish I would have known I was going FI at the start of my build those TFS are not cheap lol.
