turboing on 10:1 compression ratio... safe????
07-02-2003, 06:55 PM
#3
Honda-Tech Member
iTrader: (3)
Join Date: Feb 2002
Location: MN
Posts: 12,561
Likes: 0
Received 0 Likes
on
0 Posts
Re: turboing on 10:1 compression ratio... safe???? (whiteinteg95)
check out this post..... https://honda-tech.com/zerothread?id=306215
07-03-2003, 12:27 AM
#5
Thread Starter
Join Date: Mar 2003
Location: Santa Barbara, CA, USA
Posts: 240
Likes: 0
Received 0 Likes
on
0 Posts
so basically it takes alot of tuning to make a higher compression engine turboed but the end result from a higher static compression ratio is worth it.
on an n/a engine, would you feel a huge difference from compression ratios like 8.5:1 compared to 10.5:1?
on an n/a engine, would you feel a huge difference from compression ratios like 8.5:1 compared to 10.5:1?
07-03-2003, 03:32 AM
#6
Member
Join Date: Oct 2002
Location: phoenix, hawaii
Posts: 4,475
Likes: 0
Received 0 Likes
on
0 Posts
Re: (whiteinteg95)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whiteinteg95 »</TD></TR><TR><TD CLASS="quote">so basically it takes alot of tuning to make a higher compression engine turboed but the end result from a higher static compression ratio is worth it.
on an n/a engine, would you feel a huge difference from compression ratios like 8.5:1 compared to 10.5:1?</TD></TR></TABLE>
yes
on an n/a engine, would you feel a huge difference from compression ratios like 8.5:1 compared to 10.5:1?</TD></TR></TABLE>
yes
07-03-2003, 03:34 AM
#7
Honda-Tech Member
Join Date: Oct 2001
Posts: 1,112
Likes: 0
Received 0 Likes
on
0 Posts
Re: (whiteinteg95)
It depends a lot on the turbo, also. With higher compression you can usually get away with a slightly larger unit at equivalent lag. Thereby increasing the potential output substantially. But yes, tuning becomes all that more important.
Difference between 8.5:1 and 10.5:1? I could tell a signifigant difference on my single cam. Went from 8.5:1 f/i to 10.8:1 n/a and the n/a set-up was more responsive on the low end. The larger the displacement, the less noticable though.
Difference between 8.5:1 and 10.5:1? I could tell a signifigant difference on my single cam. Went from 8.5:1 f/i to 10.8:1 n/a and the n/a set-up was more responsive on the low end. The larger the displacement, the less noticable though.
Trending Topics
07-03-2003, 07:32 AM
#8
Join Date: Sep 2002
Location: Connecticut
Posts: 125
Likes: 0
Received 0 Likes
on
0 Posts
Re: (DSF)
I tuned a stock S2000 (11:1 comp) witha Vortech charger runing 9.5 psi.
Smaller pulley on now, re-tuning 'new' boost. ~10.5-11 psi
It can be done, but you have to 'creep' up on the tune.
Start fat and soft thne lean it out a little at a time and bring some timing in.
You don't need much timing on 11:1.
It can be done, you better be on top of your tuning game.
Jeffrey Atwood
Smaller pulley on now, re-tuning 'new' boost. ~10.5-11 psi
It can be done, but you have to 'creep' up on the tune.
Start fat and soft thne lean it out a little at a time and bring some timing in.
You don't need much timing on 11:1.
It can be done, you better be on top of your tuning game.
Jeffrey Atwood
07-03-2003, 08:14 AM
#9
Honda-Tech Member
Join Date: Dec 2001
Location: Gresham, Oregon, USA
Posts: 5,418
Likes: 0
Received 5 Likes
on
5 Posts
Re: (Jefnes)
The highest we run is ~10.5:1 and that's setup for 25-35lbs. of boost... For street I definately wouldn't go any higher than that as you'll already need to run race gas everywhere... On all of our street turbo cars so far they all run 9.0:1 with Brian running the most boost right now at ~23lbs. (22.6 to be exact)... He made 536whp, 340wtq, and ran an 11.11@132 spinning the **** out of his MT 24.5x9x13 slicks... He's got his 26x8.5x15 slicks but he needs a B16 tranny before we run them... Even with the GSR tranny it wouldn't get boost in 4th as the "artificial gearing" is just too long... What are all you guys running with 26 inch and bigger slicks? B16+4.785 FD? That's one thing I thought of but i just don't have enough experience to really know... Not to get off track some crazy **** we just heard is one of our friend's just got done with his full race car... It's running 13.5:1 and is setup for 22-28lbs of boost... All of us really don't know how it's gonna work... We don't want it to pop first time out as he has lotz and lotz of money into it but that's a **** load of compression... Oh well, we'll see... Peace
07-03-2003, 09:25 AM
#10
Join Date: Feb 2003
Location: stockbridge, ga, usa
Posts: 362
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Kataku2K3)
what is the safe psi or the most psi for a b18c1 9:0:1 comp if tune right? going to dyno soon w/ new turbo. at what whp or psi will i need to resleeve my block? for daily driving.
what i have is:
precision t03/to4e .57trim .60 compressor .63a/r turbine stage 3 wheel (don't know the sc model)
tial 38mm
9:0:1 je
crower rods
sorry if i high jack this thread. figure most people here would know. thanks
what i have is:
precision t03/to4e .57trim .60 compressor .63a/r turbine stage 3 wheel (don't know the sc model)
tial 38mm
9:0:1 je
crower rods
sorry if i high jack this thread. figure most people here would know. thanks
07-03-2003, 09:31 AM
#11
Honda-Tech Member
Join Date: Dec 2001
Location: Gresham, Oregon, USA
Posts: 5,418
Likes: 0
Received 5 Likes
on
5 Posts
Re: (luckypon7)
My friend's stock sleeved B18C running JE 9.0:1 slugs, T3/T04E, Eagle Rods, Portflow P72 cylinder head, Hondata, etc. is making 362whp on 12lbs... His best is an 11.6@121 in his full interior EJ6 on MT 24.5x9x13 slicks... Like I said Brian's car which basically the same as the first one only with a GE sleeved to a 1.98L block makes 536whp on 22.6lbs... Duc's 1.98L B18C is the same as Brian's except his block is o-ringed with Crower 4340's and his EM is a lil crazier... It's also running 9.0:1 and his Precision SC67 just came back in so we're looking for ~650whp+ probably on the bottle too 
Thread
Thread Starter
Forum
Replies
Last Post
