Turbo compressor maps?

[ReadySetGo]

Just wondering if anyone knew a site with compressor maps listed. I have a nice little IHI that needs some fsae lovin http://fsae.com/groupee_common/emoticons/icon_smile.gif.

-Omar
CSU, Sacramento

A rotory fsae car?

[ReadySetGo]

Just wondering if anyone knew a site with compressor maps listed. I have a nice little IHI that needs some fsae lovin http://fsae.com/groupee_common/emoticons/icon_smile.gif.

-Omar
CSU, Sacramento

A rotory fsae car?

[Big Daddy]

Do you have the model # because I contacted IHI and they said they would have to look to see what they had that would fit the application.http://sdsefi.com/features/apr00stool.htm

This is also an IHI turbo.

[Big Daddy]

Sorry that pic dint work here is the link to the page

http://sdsefi.com/features/apr00stool.htm

http://fsae.com/groupee_common/emoticons/icon_cool.gif

[Denny Trimble]

I think this one might be the right size...

http://www.stud.ntnu.no/~shane/stasj/div_bilder/241.html

University of Washington Formula SAE ('98, '99, '03)

[ReadySetGo]

hahah those are definetely sweet!! As a senior project im going to turbo the '04-'05 car, but if those plans dont fall through i'll have to make a turbo'd shopping cart! http://fsae.com/groupee_common/emoticons/icon_biggrin.gif.

IHI rhb32 is the hair drier im working with, btw.

-Omar

A rotory fsae car?

[PS]

Hi,

Where did you find the RHB32?. Is that the one off the Suzuki Swift?

PS

[ReadySetGo]

i have no clue where it came from. but it was sitting in the shop one day, i took a look at it and hoped it would work. Now im on the quest of finding some compressor maps.

Supposedly it came off a dihatsu 3cyl turbo charade. I think thats the equivalent of a swift?

Now getting the turbo to work with the high compression of a zx6r is going to be fun http://fsae.com/groupee_common/emoticons/icon_smile.gif. Thermo books here i come!

-Omar

A rotory fsae car?

[PS]

I also have an RHB32 and the two Garrett turbos that are offered through the sponsorship deal. I talked to a shop that turboed a 400cc single cylinder with the RHB32 and he told me it gave pretty good results, he didn't tell me the boost but he said it performed pretty well when they tested the bike. It boosted reasonably early, but you had to keep the engine revved high in order to get the serious boost.

To be safe, you should lower the CR. I'm guessing your running around 11:1? If you don't have the maps and you test with that compression, you might blow the engine because you have no idea what boost the turbo will produce. It's better to be safe than sorry.



PS

[Kevin Hall]

Don't worry about your CR. By the time you could make enough boost to hurt things, your restrictor chokes. Stock bikes are 11 to 12 to 1, and that is just fine with 100 octane, aluminum heads, and restrictor.

"I don't really believe that lowering the compression ratio of your engine
should be necessary for FSAE applications. We've run 3 cars with forced
induction (CBR 600F1, F3) and have never had a problem with preignition or
detonation. Using the 100 octane fuel and a not-so radical advance curve,
we've successfully run 8 psi which was enough to give us top power this
year.

In 1999, I also had a discussion with one of the design judges who was
judging our engine and drivetrain, and he agreed strongly on this point.

The main issue with running really high boost, which is where lowering the
compression ratio would be necessary, is that the choking point of your
restrictor will lower dramatically (in terms of engine speed). Then, you
effectively top out the performance of your turbo and engine combination
before the engine has actually reached its design-and-built-in sweet spot,
which for these bikes is typically greater than 10,000rpm. At 8 psi, we
choke our restrictor under 9,000 rpm, but through a little creativity
continue to pull until 12,000 rpm.

The thing to watch out for is the crazy vacuum that develops between the
restrictor and the compressor inlet after the choke condition has been
achieved in the throat of your venturi (I hope you're using a venturi).
We measured pressure ratios across our compressor of 4.8 after blowing two
turbos. Considering the flow rates at the engine speeds where this
happens (after choking), it became obvious that the turbo was
over-spinning. These operating points are well over the design limit for
the type of turbos FSAE cars are using. So really, there's not a heck of
a lot that you can do to have both high boost and high engine speeds. The
only alternative is to lower boost after you've choked the restrictor,
which means you all of a sudden don't need that lowered compression ratio.

For this reason, using Honda engines, in my opinion, is a viable option
when using forced induction on an FSAE vehicle. We have used them for
the past three years, and will continue to use them in the future. The
fat sponsorship checks that Honda hands out to teams with good business
proposals don't hurt any either.

Cheers,

Mike Wallans
Carleton University FSAE"

Kevin Hall
University of Saskatchewan
'03-'04 Team Director

[PS]

Kevin,

What kind of boost did you see with your turbo, if you don't mind me asking? I'm looking into a turbo also, we have the two Garrett turbos from the sponsorship and an IHI RHB32.

[PS]

Forget about my question, You mentioned the boost level in your thread. 8psi. Sorry.

PS

[Kevin Hall]

Hey PS

That is all a quote of an email that Mike Wallans typed up a few years back. I tend to agree with his comments.

Kevin Hall
University of Saskatchewan
'03-'04 Team Director