Which Turbo to USE? (Small or Big?)

[Police]

What turbo do you think I should use on my D15B7 engine?
IHI RHB5 or Garrett T3 .42/.48
Remember its all stock internals and boosting under 10PSI.
Daily Driven car so reliability is a must.
Ofcourse it will be tuned and intercooled.

[cookbob]

try www.d-series.org or www.turbod16.com
they prob could help you out a little more.

[Police]

i'm leaning towards the IHI since its easier for me to work with, it has less shaft play then the T3, and its my first turbo project. Your votes are still welcomed.:thumbsup:

[kevie88]

If it's going to be a low boost application I'd use the smaller of the two turbos to keep the lag way down. If outright boost and huge flow isn't the requirement it's best to stay small, unless you want to make the engine mods to support the huge turbo down the road. In the mean time tho, performance would really suck on the street with the big one.

[DonJuan]

^ exactly what he said :thumbsup:

[Hollywood]

I vote niether!

Just get a cheap t3/t4 50 trim, .63 turbine, stage 3 wheel and call it a day. Some may prefer the .48 instead.

[gpomp]

Originally posted by Hollywood
I vote niether!

Just get a cheap t3/t4 50 trim, .63 turbine, stage 3 wheel and call it a day. Some may prefer the .48 instead. on a 1.5L non vtec aka the shittiest motor ever put into a civic? :thumbsdow

imo, the rhb5 will make enough power for a stock d15b7.

[pressure_ratio]

Go with a t3,they're a dime a dozen,cheap and everyone carries parts for them.As far as size go with the one thats best matched to your engine.They're both fairly small so I doubt that lag will be much in an issue.Just remember that with stock internals your enginr won't have much tolerance for heat if you decide to turn the boost up a bit and you fall out of the comps efficiency range.Small does not always = good.

[Ekbusta]

the IHI is a shit turbo for the D-series, it will run out of steam why before the rev limit in the higher gears. You should bolt on something bigger then that t3, but it will do, car will still rip hard. :)

[LUDELVR]

The title is misleading. You should have titled it "what turbo to use, small or ...smaller!

Anyway, don't bother with the ihi, just get the t3.

[Dirty_SOHC]

Forget the IHI. go with the T-3 50 trim its more suited for the size of the engine.

[legendboy]

Definatly don't waste your time with the IHI. Unless 125whp is your ultimate goal. The small stage 1 or 2 T3 is suited suprisingly well to honda 1.6L.

[gpomp]

Originally posted by legendboy
Definatly don't waste your time with the IHI. Unless 125whp is your ultimate goal. The small stage 1 or 2 T3 is suited suprisingly well to honda 1.6L.
i made 151 whp with my pos. :D :poosie:

[legendboy]

fak off really?? haha

[Aleks]

Originally posted by gpomp

i made 151 whp with my pos. :D :poosie:

Yeah at 15 pounds... :rofl:

[djfob]

You'll end up upgrading from the ihi anyways so might as well get something bigger. Although used T3s are getting harder to find and cost alot more than they use to.

[gpomp]

Originally posted by legendboy
fak off really?? haha



Originally posted by Aleks


Yeah at 15 pounds... :rofl:

i didn't say how long it'll last... :burnout:

[sml]

Originally posted by gpomp

i didn't say how long it'll last... :burnout:

Still going as of 8hrs ago! :eek:

[finboy]

Originally posted by djfob
You'll end up upgrading from the ihi anyways so might as well get something bigger. Although used T3s are getting harder to find and cost alot more than they use to.

they are EASY to find, you just have to know where to look :devil:

[Aleks]

Originally posted by sml


Still going as of 8hrs ago! :eek:

:rofl:

[Police]

Originally posted by gpomp

i made 151 whp with my pos. :D :poosie:

what was your setup? what turbo did you use? intercooled? what fuel management?

[gpomp]

Originally posted by Police


what was your setup? what turbo did you use? intercooled? what fuel management?
some garbage rhb5, yes, uberdata, walbro pump, rc injectors... on a b7.

[Police]

^ ya right? well my IHI rhb5 is from a Subaru, i compared it to an ISUZU IHI rhb5 the compressor is smaller and the housing did not interchange because of that, but the exhaust turbine is the same. Not too sure about the Ford/Mazda one but i think that might be the one your were running with. Also how many PSI were you running with only 151WHP?

[gpomp]

somewhere between 10 and 15 psi. im not really sure since autometer gauges are junk. :guns:

[ninspeed]

Originally posted by gpomp
somewhere between 10 and 15 psi. im not really sure since autometer gauges are junk. :guns:
12 psi spikes, avg 10.5.. according to the gauge on tomas dyno

[Police]

actually 151 WHP isn't too bad casue that would mean you're making over 200HP on the flywheel assuming 30% loss to the wheels. Over 200 HP on stock internals is pretty good, for 30% loss you're makin 215HP on the engine getting 151WHP. Please correct me if you think i'm wrong.:dunno:

[Aleks]

He made the 151 on a mustang dyno so that's lower than dynojet. My quess would be about 190-200 flywheel hp.

[egmike]

I have had both turbos on my D16z6, I would go with the T3, The IHI is ok but you will want to upgrade it ... so go with the t3 :thumbsup:

[youngbex]

haha a IHI RHB5 are you kidding me thats my stock turbo it sucks ass.

[tsi_neal]

Originally posted by Police
actually 151 WHP isn't too bad casue that would mean you're making over 200HP on the flywheel assuming 30% loss to the wheels. Over 200 HP on stock internals is pretty good, for 30% loss you're makin 215HP on the engine getting 151WHP. Please correct me if you think i'm wrong.:dunno:


Well i think your wrong :poosie: Im not gonna comment on differences between dynojet and mustang dynos... BUT a good FWD transaxle should be no worse than a 15% driveline loss. Its pretty accepted that fwd ~15%(or less) loss rwd ~17% car awd little over 20% and inefficiant trucks might see 30% loss

As far as the turbo, im not to sure about honda setups but if all out power isnt a goal id be more inclined for the smaller setup. But this is coming from a guy that was pretty frustrated with turbo lag near the end of last year. And since i blew the talons motor and have been crusing around in a torquey beast (pulls well from about 1500rpm) that puts a big smile on my face.

[Police]

ya i perfer more low end, its already bad enough that i have to rev the fuck out of my honda motor to get some power out of it. It would just make it worse to have to do the same high revving to get power with a bigger turbo, its kinda annoying. I mean i drive under 3000RPM all the time and this is a D15 with "toothpick" rods lol if Subaru thought this turbo would be OK for a 1.8 then i think it'll be fine for 1.5. For sure though i'm keeping the T3 for my ZC or B series engine thats coming up next.:burnout:

[Police]

Originally posted by youngbex
haha a IHI RHB5 are you kidding me thats my stock turbo it sucks ass.

when does it hit boost and when does it run out of steam?

[gpomp]

Originally posted by youngbex
haha a IHI RHB5 are you kidding me thats my stock turbo it sucks ass. you're car is a 2.2, we're talking about a 1.5 here. i bet that turbo would suck ass if it were on say a h22 or something.

[Ekbusta]

Originally posted by Police
ya i perfer more low end, its already bad enough that i have to rev the fuck out of my honda motor to get some power out of it. It would just make it worse to have to do the same high revving to get power with a bigger turbo, its kinda annoying. I mean i drive under 3000RPM all the time and this is a D15 with "toothpick" rods lol if Subaru thought this turbo would be OK for a 1.8 then i think it'll be fine for 1.5. For sure though i'm keeping the T3 for my ZC or B series engine thats coming up next.:burnout:


dude, go with the T3, it is the perfect size. and if you never go abouce 3000, you shouldn't be turboing your car silly. you will be disapointed with the IHI.

[Police]

Originally posted by Ekbusta



dude, go with the T3, it is the perfect size. and if you never go abouce 3000, you shouldn't be turboing your car silly. you will be disapointed with the IHI.

or use a small turbo, doesn't that make sense? i'll be keeping the T3 for my ZC or B18, its better suited for those engines then my 1.5.:whipped:

[heavyD]

Originally posted by Police


or use a small turbo, doesn't that make sense? i'll be keeping the T3 for my ZC or B18, its better suited for those engines then my 1.5.:whipped:

Just look for a used T25 from a Talon/Eclipse. They are dirt cheap and spool instantly and will provide excellent midrange power for a quick little street application. At 10 psi and that puny 1.5L engine you will be at the bottom of the T3's efficiency curve even with a .48 turbine.

[jake4526]

i use to have a 1992 ford probe GT 2.2 turbo with the IhI turbo and its junk just like the probe was junk then i got a 88 trans am with a motor swap for a LS2, if i were you i wouldnt deal with 4 bangers and just get a real muscle car its alot faster and easer to find parts, and it doesnt sound like it came out of a ceral box.

[Jason Lange]

Originally posted by jake4526
i use to have a 1992 ford probe GT 2.2 turbo with the IhI turbo and its junk just like the probe was junk then i got a 88 trans am with a motor swap for a LS2, if i were you i wouldnt deal with 4 bangers and just get a real muscle car its alot faster and easer to find parts, and it doesnt sound like it came out of a ceral box.

Just a quick question how long is your mullet??:barf:

[b_t]

Originally posted by jake4526
i use to have a 1992 ford probe GT 2.2 turbo with the IhI turbo and its junk just like the probe was junk then i got a 88 trans am with a motor swap for a LS2, if i were you i wouldnt deal with 4 bangers and just get a real muscle car its alot faster and easer to find parts, and it doesnt sound like it came out of a ceral box.

hmm well man, this post is over a year old, he has already turbod his civic and been driving it for some time. probes are junk, yeah, but you put an LS2 in your 88 trans am? bullshit. your trans am is not a real muscle car, it was built 20 years too late, and just to clarify - the firebird was a pony car, not a muscle car.

[LilDrunkenSmurf]

Originally posted by Jason Lange


Just a quick question how long is your mullet??:barf:

hahahahahaha how true... (sits back and grabs the popcorn)

[h_s]

:rofl:

[madmazda]

Hey now don't bust on IHI turbos, I have one and they help make good HP gains just ask Silver boost and his 285 hp turboed ser5 the little 1.6l turbo SORT OF kept up just fine to his car....