<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">A stock 4g63 is like 7.7:1 and they dont feel bad out of boost even with a big hybrid. Make power with boost not dynamic compression. It doesnt matter what all out racecars run, different application.</TD></TR></TABLE>

Actually, from a former DSM owner, they do feel bad out of boost.

Low compression for turbos went out with tuning using a VAFC. With the tools we have these days to get nearly perfect fuel ratios, there is no reason for it. Just my opinion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tshracing &raquo;</TD></TR><TR><TD CLASS="quote">Jojo carlos (professional driver) runs a 14:1 compression motor turbo. Ive seen 12:1 compression turbo and its all about the tuning.</TD></TR></TABLE>

I'm sure Jojo runs pump gas too...

 

yeah and I bet that car isnt street driven either.

Joppe, nice to have some other people from finland here.

 

I'm running 9.0:1 cr, good spool, full boost by 4,800 rpm's, and its a safe tune.

 

SO I should need to have 16:1 compression with a notebook paper headgasket to make some sick power all on 89 octane from US gas...I think Ill go with 9:1

 

I guess that 4G63 7.7:1 compression ratio is a US thing because the lowest they go over here is 8.5:1 ('92~'94 EVOI/II). My 8.8:1 compression EVO IV feels great when it's not in boost but boost comes online real fast in my car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dee &raquo;</TD></TR><TR><TD CLASS="quote">I guess that 4G63 7.7:1 compression ratio is a US thing because the lowest they go over here is 8.5:1 ('92~'94 EVOI/II). My 8.8:1 compression EVO IV feels great when it's not in boost but boost comes online real fast in my car.</TD></TR></TABLE>

90-94 eclipse/talon/laser are 7.7:1
95-99 eclipse/talon are 8.5:1

Evos (we only got the VII and IX) are like 9:1 I think.

 

what are the best type of cams to go with???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tshracing &raquo;</TD></TR><TR><TD CLASS="quote">Jojo carlos (professional driver) runs a 14:1 compression motor turbo.</TD></TR></TABLE>

I asked Jojo personally about his setup a few years back when I saw him at the NOPI Nationals. He confirmed that it was 14:1 compression ratio, running over 30 pounds of boost and his power levels (back then) were between 900 and 1000.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .dave &raquo;</TD></TR><TR><TD CLASS="quote">

I'm sure Jojo runs pump gas too... </TD></TR></TABLE>

I think he said it was some mixture that included methanol.

 

I RUN 8:8 COMPRESSION ON MY LS VTEC TURBO AND IT PUSHED 240WHP ON 6.5 PSI. RUNS LIKE A CHAMP

 

ive been boosting honda's for going to 6 years now. my old motor i had in my street car which was an ls was 8.1 cr and it was a pig out of boost. then i got a built ls/vtec 9:1 cr felt alot stronger this was a motor i raced with for 2 years strong... now i got a 10:1-10:5:1 cr motor going together that im planing on making 800+hp on.. I would say anywhere from 9:1 to 10:1 on a street car will work dont go lower than 9:1... as long as you tune the car good 9:1 to 10:1 will be fine

 

Never heard of a JoJo Carlos. Is he related to Arturbo?

But when you're at the HR level, there are only a few ways to make more power. Raising the compression is one way, but also more tricky to tune. But if your setup is only meant to last a few runs before being torn down, ran on methanol, then I don't see why you can't boost on high CR's, especially when you have a few blocks as backup.

But for street use, on pump, stick with &gt;10:1 CR's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vaporboy12 &raquo;</TD></TR><TR><TD CLASS="quote">ive been boosting honda's for going to 6 years now. my old motor i had in my street car which was an ls was 8.1 cr and it was a pig out of boost. then i got a built ls/vtec 9:1 cr felt alot stronger this was a motor i raced with for 2 years strong... now i got a 10:1-10:5:1 cr motor going together that im planing on making 800+hp on.. I would say anywhere from 9:1 to 10:1 on a street car will work dont go lower than 9:1... as long as you tune the car good 9:1 to 10:1 will be fine </TD></TR></TABLE>
What wrong with going lower than 9:1. I run 8:8 daily driver with low boost, pulls hard all the way to redline. I got dyno chart to prove. Come on bro. Put a reason why we cant go below 9:1. ???

 

power band i bet looks like crap!! are will not make power out of boost or transition into boost and it will take long to make the boost

 

power band is smooth and keeps climbing. Im not not even tuned for 10ilbs yet. RUn it before you talk man. Ill take you any day in the streets

 

i dont give a damn about na. im boosted4 life. It spools quick 3k and when vtec kicks in doesnt stop pulling until 8200

 

I had a second gen DSM and can say out of boost it kind of sucked. I run stock compression with an SC34 and it feels fine. Made 340. My friend has an SC 61 with 8.5 and he says it sucks. I rode in it and it doesnt feel as fast as mine...he was having a couple issues though. Before he got into boost it sucked ***

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PnoyEj6 &raquo;</TD></TR><TR><TD CLASS="quote">power band is smooth and keeps climbing. Im not not even tuned for 10ilbs yet. RUn it before you talk man. Ill take you any day in the streets</TD></TR></TABLE>

once again i know what im talking about here. you on the other hand dont.. post a dyno graph so i can see it still climbing... ive built and tuned a few car.. i think i know what im talking about here... if i did not know about what im talking about i would have posted.... i dont street race..... dont talk if you dont know period.....

 

i dont street race either bro, lets take it to the track. I will redyno my car to prove you wrong.

 

btw Sonics suck

 

hey i got nothing to prove when you can run some times i have then we can talk untill then dont talk. i know what im talking about here. you on the other had dont

 

run 9:1, lower comp will be safer but 8:1 is the lowest I would go. I had a 11:1 motor N/A before and running 9:1 comp turbo motor now, you can barely tell the difference in torque. Besides I make 150ftlbs at 38000rpm, after that it's take off!How much power you trying to make? Oh yeah as far as turbo cams ITR or GSR only. Do not listen to anybody talking about anything else. Ther is only one after market cam I heard of that is good and that is GSC. Go to Evans-tuning.com and study all the dyno graphs. It helps you know what is working for other ppl.

 

i run gsr cams. I can talk what I want. Lets see those dyno charts tough guy