I keep hearing that SI motors are no good when Boosted. I was told that the torque was weak. I keep hearing about SI's running 14's - 15's with 8-10psi. Can anyone tell me different or same?

I am lookin' for a motor right now and I plan on boostin' it. Found a good deal on SI. Should I do it is the question.

 

i ran 13's on 7psi

 

13.738 @ 7psi untuned!

 

https://honda-tech.com/zerothread?id=615546

try that thread!

ill post my numers when i finish my set-up....

 

I ran 13s on 7psi with a b16a2 also.

b16a all motor.

b16a FI

 

or a B16 with 84mm bore yumm.... but then again its more like 1.7X - 1.80 L

 

damn, awesome, 13.7 at 7psi = amazing. very impressed

 

my B16 on 10psi

 

HAHAHAH....done and DONE!

 

LOL! N/A B16 with power is just a pipe dream unless you are an engine god...or have a lot of $$ to throw away.

See sig.

 

torque is so overrated.. imagine how much torque an F1 indy car makes..

 

My buddy Twistedhatch who is a honda-tech member also had a SIR 2 Stock motor fully tuned with hondata on 11psi and his car ran 12.94 while it blew up. But the thing was that he launched it at like 7500 RPM's on 24x8 Bogart's and it about died because it didn't have enough torque to pull it outta the hole. Where as his stock B20 ran exactly the same thing with about 50 less hp but it had enough torque to get off the line. So you can see the 2 differences but the more torque you have the better you are gonna be.......................

 

are we talking the USDM or the JDM b16a2? Im running the SIR2 block (170hp, p30 pistons).. and i was wondering the same thing.... any issues w/ detonation?

 

ya it was the jdm sir 2 170hp.........as far as i know there wasn't any detonation, at least that you could see on the plugs, it was tuned at like 11.8psi wich is right below what the stock map will read and it ran perfect........i think it was just too much pressure for the stock pistons, it cracked a ringland or something, the thing still runs just smokes a tad......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM CTR EK &raquo;</TD></TR><TR><TD CLASS="quote">I keep hearing that SI motors are no good when Boosted. I was told that the torque was weak. I keep hearing about SI's running 14's - 15's with 8-10psi. Can anyone tell me different or same?
</TD></TR></TABLE>

Who ever told u that is ******* moron.

 

** VIDEO ** Who ever said b16's were useless? / Stock b16 / Precision sc63 / Full-Race / 11psi

 

i just went for a ride in a B16a1 turbo CRX tuned at 15 psi and made 255HP that thing pulled hard as hell. i have a vid of it in the appearance forum under the CT meet.

 

Keep posting please. I am still tryin to figure out if i should just buy an SI motor now (jdm b16 170hp) or just save a lil' more and get a b18c1 (jdm gsr). No matter what it's going to be turboed in a few months afterwards.

I just don't know if i should just used the saved money from the B16 and use it towards a turbo kit.

 

i say save some money(get the b16) and put it towards your turbo(hondata), i have a '00 si stock internals 241whp & 158lb torque @6.5 psi

 

i making 245whp and 178wtq on 1990 b16, @ 7psi ..

sig

 

what was your setup. i keep reading about how you are making this amount of power and i am beginning to think that my motor is fucked up or that i have a weak link in my setup. I made 241/172 at 7lbs in a stock block gsr with skunk2 manifold, revhard kit, and greddy sp exhaust hondata and 550's. Do you think the exhaust is ******* me up??

Here is my dyno sheet:

 

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

Who ever told u that is ******* moron. </TD></TR></TABLE>

ran a 13.8 at 104mph at 6.5psi on fmu with my b16.
street tires.

 

that gsr turbo should be making more power, even with that exaust.. .

check compression
check plugs
whats the afr under wot?
maybe it was tuned fairly rich?

 

Granted this is a full-out drag car, but I ran a 10.985 @ 124.68
with a stock block, stock head b16....
it dynoed at 300 whp & 201 ftlbs... at 11psi
since then I have raised the boost to 13psi and ran the 10.9....

hope this helps

 

haha boostsohfast ran 13.6 on 7 psi with a sohc vtec with a 15G turbo. :-P