what compression ratio for more boost
02-17-2009, 06:16 PM
#21
If money is not really the main issue here and want to do it right the first time around, then you really need to find a donor 94-97 engine for about $300-$400. You could look for a 99-00 with the better head for $800-$1000, but that may be more than you want to spend. You are already going to be spending a good $1700-$2000 to get everything and build the engine. That $300-$400 will be make a huge difference and it is very easy to do.
Trust me you will kick youself later for not finding a decent donor motor and swapping that in with it.
I am going to go the belfab kit route here in the next few weeks too. Looks to be a decent kit, especially for the price. FWIW, I am going with the 9.0, but you may want to go with the 8.5 with that much boost.
Trust me you will kick youself later for not finding a decent donor motor and swapping that in with it.
I am going to go the belfab kit route here in the next few weeks too. Looks to be a decent kit, especially for the price. FWIW, I am going with the 9.0, but you may want to go with the 8.5 with that much boost.
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02-17-2009, 07:06 PM
#22
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If money is not really the main issue here and want to do it right the first time around, then you really need to find a donor 94-97 engine for about $300-$400. You could look for a 99-00 with the better head for $800-$1000, but that may be more than you want to spend. You are already going to be spending a good $1700-$2000 to get everything and build the engine. That $300-$400 will be make a huge difference and it is very easy to do.
Trust me you will kick youself later for not finding a decent donor motor and swapping that in with it.
I am going to go the belfab kit route here in the next few weeks too. Looks to be a decent kit, especially for the price. FWIW, I am going with the 9.0, but you may want to go with the 8.5 with that much boost.
Trust me you will kick youself later for not finding a decent donor motor and swapping that in with it.
I am going to go the belfab kit route here in the next few weeks too. Looks to be a decent kit, especially for the price. FWIW, I am going with the 9.0, but you may want to go with the 8.5 with that much boost.
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02-17-2009, 07:45 PM
#23
Pretty sure I'm not the only one that hates reading blocks of words with no punctuation or capitalization. And the fact that it's usually a newb who also failed to search doesn't help either.This forum is getting full of more BULLSHIT every day.
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02-17-2009, 09:46 PM
#25
I know I keep stepping in it...
like rharris said, a 1.8 block with the 99 head is the way to go. If you are going to try to push 25psi then you might as well get a good flowing head and some good cams so that you can make the most power for you pressure, since it seems you are going to go big power.
like rharris said, a 1.8 block with the 99 head is the way to go. If you are going to try to push 25psi then you might as well get a good flowing head and some good cams so that you can make the most power for you pressure, since it seems you are going to go big power.
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02-17-2009, 10:33 PM
#28
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Weird. The language has their name on it. People from over there with class are typically very particular about how it's used. And the rest are where West Virginia came from. My apologies to any tarheels who may be offended by that.
If the OP doesn't run some kind of air filter on that turbo, he should be banned from all forums for life.
If the OP doesn't run some kind of air filter on that turbo, he should be banned from all forums for life.
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02-17-2009, 11:35 PM
#29
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It's not like it's overly difficult to type decent. Pretty sure I'm not the only one that hates reading blocks of words with no punctuation or capitalization. And the fact that it's usually a newb who also failed to search doesn't help either.
This forum is getting full of more BULLSHIT every day.
Pretty sure I'm not the only one that hates reading blocks of words with no punctuation or capitalization. And the fact that it's usually a newb who also failed to search doesn't help either.This forum is getting full of more BULLSHIT every day.
seriously though, i understood his question. and what confuses me a little (and I'm not picking on you, pat) is that everyone continues to help this guy even in spite of his total disregard for spelling and punctuation.
just call him an idiot and be done with it.
madmalc: here's a tip before my suggestion takes effect: try to communicate more clearly and you'll get where you want to be MUCH faster. save the cheeky chav talk for the Max Power boards or whatever.
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02-17-2009, 11:48 PM
#30
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US and UK - Two countries separated by a common language.
Do you have any data logs or dyno graphs? I would like to see what your boost versus RPM is like with that turbo. You should be making a buttload of power already at 17 psi with a GT2876.
Do you have any data logs or dyno graphs? I would like to see what your boost versus RPM is like with that turbo. You should be making a buttload of power already at 17 psi with a GT2876.
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02-18-2009, 11:23 AM
#32
I would think you would be used to it by now.
To the OP:
You want to run the highest CR you can without crossing the knock thresh-hold. Seeing as the premium gas on the other side of the pond is a higher octane, you could do well with a 9:1CR and still not have any issues with a good size turbo, a good FMIC, and some good tuning. You could even go with something higher (9.5+:1) and run some water/meth to keep it from knocking. My advice, goto a tuner and engine builder with experience with Miatas. What part of the UK are you in? I have know a few shops in N. Ireland that would be able to help you.
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02-20-2009, 07:08 PM
#33
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my spec
gt2876r turbo (ball bearing garret)
t3 actuator 17psi sping
inconel tubular manifold
3" turbo back
3 angled oversized valves
titainium valve springs
solid lifters
obx stage 2 cams
vernier pulleys
ported and polished head
port matched inlet and exhaust manifolds
RC750cc low imp injector
tunertoyz dual feed rail
walbo 225 fuel pump
sard afpr
4lb flywheel
6 puk padle clutch
quaife straight cut gearbox
concentric release bearing
balanced prop and uprated uj's
1800 diff casing cusco lsd
gaz coilovers
fm antiroll bars
rose jointed drop links
rose jointed adjustable rear top arms
rose jointed front track control arms with drop spaces
lock stop spacers
fully poly bushed
hispec 4pot billet calipers
2 piece split front discs alloy bell and steel brake surface
mintex race pads
mk2.5 279mm grooved rear discs
mintec race pads
willwood brake bias valve
hydraulic handbrake (slave cylinder mounted to standard handle)
braided flexi's
rota 16x7 front wheels
rota 16x8 rear wheels
yokohama tyres
hydra nemis engine managment (self tuned)
etb instruments digi dash
momo carbon fibre seats
trs 5point harnesses
........................some how i very much doubt a shitty car, oh and its got nitrous
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02-20-2009, 07:46 PM
#34
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Suuper tempted to go find a pile of dog poo and throw it in a Ziploc.
madmalc, the only thing less impressive than whipping out a page-long parts list to try to prove that you're somehow better than someone else is whipping that parts list out after asking such a basic question. There have been multiple discussions about what compression ratios various people have gone with and for what reasons, and all of those threads can be turned up with a little use of the search function.
If you intend to stick around, I would suggest you not only learn to use the search function, but your shift keys as well - you invented the damn language, so you should use it properly. If that sounds elitist, it's because it is. This isn't Hondatech, and we don't talk like we're on MySpace. Asking intelligent questions with proper grammar will trigger informed, intelligent, and coherent responses like you've never seen on any other forum; asking stupid questions without capitalization will get you a thread full of bullshit. Take your pick.
madmalc, the only thing less impressive than whipping out a page-long parts list to try to prove that you're somehow better than someone else is whipping that parts list out after asking such a basic question. There have been multiple discussions about what compression ratios various people have gone with and for what reasons, and all of those threads can be turned up with a little use of the search function.
If you intend to stick around, I would suggest you not only learn to use the search function, but your shift keys as well - you invented the damn language, so you should use it properly. If that sounds elitist, it's because it is. This isn't Hondatech, and we don't talk like we're on MySpace. Asking intelligent questions with proper grammar will trigger informed, intelligent, and coherent responses like you've never seen on any other forum; asking stupid questions without capitalization will get you a thread full of bullshit. Take your pick.
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02-21-2009, 12:10 PM
#36
I just read through two pages of posts and realized there is no useful information here except a lesson in English. Maybe there should be some educated responses and useful information provided. Stop the child talk and get to business or don't answer his post. It is not required from forum members to answer to every post. If you don't have anything to add DON'T ANSWER. If the bull **** about English did not come across there might be some useful information here.
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02-21-2009, 12:23 PM
#37
I just read through two pages of posts and realized there is no useful information here except a lesson in English. Maybe there should be some educated responses and useful information provided. Stop the child talk and get to business or don't answer his post. It is not required from forum members to answer to every post. If you don't have anything to add DON'T ANSWER. If the bull **** about English did not come across there might be some useful information here.
You want to run the highest CR you can without crossing the knock thresh-hold. Seeing as the premium gas on the other side of the pond is a higher octane, you could do well with a 9:1CR and still not have any issues with a good size turbo, a good FMIC, and some good tuning. You could even go with something higher (9.5+:1) and run some water/meth to keep it from knocking. My advice, goto a tuner and engine builder with experience with Miatas. What part of the UK are you in? I have know a few shops in N. Ireland that would be able to help you.
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02-21-2009, 01:46 PM
#40
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Isnt the answer to this question sort of simple? What ratio? A lower one. 9:1 is pretty common for the higher power guys, so common sense would tell you shoot for the same or lower.
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