my motor is a b16. the Compression ratio is 8.8:1 that is very low in a b16 redline will ultimately be 9500 rpms Im leaning towards the .63 a/r But I am worried about only having top end and no midrange and low end. I want when I step on my gas the car goes not waiting for boost to hit. what do you think of this. sc61 "e" housing .63 a/r ?? btw I have AEM ems

 

If you want low end you should of went with a higher compression ratio. I have yet to see someone use a .48 A/R turbine housing. Honestly I would like to see a .48 A/R SC61 dyno sheet. Even with an 8.8:1 compression ratio and a 9500 rev limit you shouldn't have problems making power and pulling good times with the .63 A/R turbine housing.

 

There is tons of info on this if you search. There is no low end on a sc61 and a stock bore. The mid range and especially top end are excellent though. If you go with a .48 you may get a 400 rpm quicker spool but your top end will suffer considerably

Everyone who rides in my car (B18c SC61 9:1 comp) is like The power is all above 5000 rpm though, but im real happy with it. I know how to drive my car and passengers can't tell its laggy. I also have my low end tuned for all the power i need there, its not slow.

If you want low end look into a smaller turbo. i had a t3/t4b .63 and it would spool around 2500-3000 rpm but its not as fun as my sc61. When i built my motor i switched to the sc61 and im glad i did. The t3/t4b is more like a beginner turbo but it could still make 400 hp.

 

It may take 5000 rpms to hit 10-12psi but the car will pull really hard while building up boost right?

 

there were some SC61 dynos posted not too long ago, hit up the search button

Cause Im nice ...

https://honda-tech.com/zerothread?id=654448

 

Just to give you a idea i have a b16a2 with 8.8:1cr with a SC50 .63ar and it spools slow as hell

 

low end is over rated. it just results in wheel spin in our cars.

 

i spoke to rod @ precision the other day and he said they don't offer the sc61 in .48 a/r turbines anymore and only in T350 (stage 5) wheel.

 

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I also have my low end tuned for all the power i need there, its not slow.
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WTF? if you have a SC61 .63 or larger, you dont have low end, period.

muckman is correct though, lowend=wheelspin

 

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

WTF? if you have a SC61 .63 or larger, you dont have low end, period.

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As stated above I wrote "I have my low end tuned for all the power i need." I never said i was boosting in low end. Its pretty elementary that a tuner can lean out a car and optimize hp even before boost comes on. To some extent my car runs better off boost than when it was totally n/a. All i meant by what I said to the original poster was that you can have a laggy turbo but by no means does your car have to be a rich running slow pig when not in boost. Maybe he wont be happy not boosting in low end but thats for him to decide. As i said before i have all the power i need down low when not in boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by S03Burner &raquo;</TD></TR><TR><TD CLASS="quote">

As stated above I wrote "I have my low end tuned for all the power i need." I never said i was boosting in low end. Its pretty elementary that a tuner can lean out a car and optimize hp even before boost comes on. To some extent my car runs better off boost than when it was totally n/a. All i meant by what I said to the original poster was that you can have a laggy turbo but by no means does your car have to be a rich running slow pig when not in boost. Maybe he wont be happy not boosting in low end but thats for him to decide. As i said before i have all the power i need down low when not in boost. </TD></TR></TABLE>

yah i know what ur saying. my friend has a turbo tercel with the 1.3L turbo starlet motor and he has a t3/t04e 57 trim on it. kinda laggy but it still doesn't feel like a pig off boost. in fact i was talking to him about having a laggy turbo (sc61 on 1.7L d16) and he said his tuner tuned his car to be "peppy" off boost. makes sense.

 

Thanks civicryda and starlets are badass cars


Modified by S03Burner at 6:21 PM 11/28/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by S03Burner &raquo;</TD></TR><TR><TD CLASS="quote">

As stated above I wrote "I have my low end tuned for all the power i need." I never said i was boosting in low end. Its pretty elementary that a tuner can lean out a car and optimize hp even before boost comes on. To some extent my car runs better off boost than when it was totally n/a. All i meant by what I said to the original poster was that you can have a laggy turbo but by no means does your car have to be a rich running slow pig when not in boost. Maybe he wont be happy not boosting in low end but thats for him to decide. As i said before i have all the power i need down low when not in boost. </TD></TR></TABLE>

sorry but your response makes no sense. its funny that you went to the extent to say "its pretty elementary that a tuner can lean out a car and optimize HP even before boost comes on...." you're way off -

a "properly" tuned motor before boost, would be a car that runs slightly rich w/ a bit of timing retard, this helps the turbo spool. Dont try to argue that either, ive proved it to be true w/ datalogs.

I dont know what kind of 'tune' youd call it, but its not optimal. (trying not to sound like a dick here)