Mikuni's VS SU's??

[Marty Rogan]

While triple carbs or injection will give you improved performance when properly tuned, your limiting factor with your current setup is the stock struts. I would invest in coil-over system first as that will lower your lap times significantly even with your SU carbs.

Just my 2 cents.

Yeah I know. I have a separate post where we are discussing coilovers. The suggestion there was to get an LSD instead.

Ideally I would like to do the Mikuni's, a hotter cam, coilovers and an LSD. I only have some much funding though, !!

I am thinking of what makes the most sense to get the most bang for my bucks. Right now the suspension handles very well. I know coilovers would be an improvement, but I am not that unhappy with the handling. So what I am leaning toward now is to get an LSD and put on the Mikuni's.

As funds allow, I will put in the hotter cam and follow up with the coilovers.

All opinions welcome!

Marty

[iron260z]

Marty I run 180 air and 150 fuel on mine runs well ( wolf creek racing) has a good pamphlet for $10-$15 on setting it up. I found them very helpful and there are ports on the manifold for vac advance.

aaron

[Marty Rogan]

Marty I run 180 air and 150 fuel on mine runs well ( wolf creek racing) has a good pamphlet for $10-$15 on setting it up. I found them very helpful and there are ports on the manifold for vac advance.

aaron

Aaron,

I have been to their websiteseveral times, but never saw the set-up pamphlet. Thanks for the head-up on that.

Glad to hear I can get vaccuum on the manifold. That is one less thing I need to deal with.

Marty

[Curtis240Z]

The Mikunis have a port for distributor vacuum advance on the front most carb. Also vacuum on the carb is not the same as manifold vacuum and thus most desireable when available. A wideband air/fuel ratio meter is immensely valueable for carb/injection tuning. I used an AEM unit mounted in my stock clock housing for a clean install.

Edited January 2, 2010 by Curtis240Z

[gira]

Marty,

This video should help you decide.

[Marty Rogan]

Marty,

This video should help you decide.

Thanks Greg. Your cars sounds really sweet!!

I am about 90% convinced to go with the Mikuni's at this point. I have not really heard anything bad about them.

Marty

[five&dime]

Only negatives IMO are cost and tuning. That being said. I would never give my 44's up Sounds ridiculoso

[gira]

Marty,

Ha ha, my car has SU's!! You should use them. They work great! I would say the driving around town might not be so great though.

Greg

[Marty Rogan]

Only negatives IMO are cost and tuning. That being said. I would never give my 44's up Sounds ridiculoso

Yep, they are bit pricey.

Do you think that they are hard to tune? Hard to keep in tune?

Marty

[Marty Rogan]

Marty,

Ha ha, my car has SU's!! You should use them. They work great! I would say the driving around town might not be so great though.

Greg

Ha ha, Greg, you are one tricky guy, !!

Are your SU's stock or seriously tweaked? I realize that the class you run in may require you to use SU's. A friend of mine that runs in Vintage up here said he is the only one in his class still running SU's.

Several people have implied that if I go with a hotter cam, that the SU's just won't let it breath enough.

Anyway, I need to get more power out of this beast. I figured the triples was one of the faster, easier ways to do it.

Marty

[five&dime]

My dad has an L28 with stage III isky cam and is running Z therapy SU's Our dyno guy said that his AF was absolutely perfect with the SU's. I don't think you will have any issues but as stated.... Mikuni's will give you more power and sound incredible when tuned right.

I had someone else tune mine. He didn't have any trouble getting them close but I need smaller jets to lean out the mixture. I am fouling plugs at higher RPM's and losing power above 4k RPM's or so. My L20 made 125 RWHP. Hoping to make 150 when I order new jets from Todd at Wolf Creek next week.

In addition, my mechanical fuel pump couldn't keep up and I had to upgrade to electronic fuel pump. I also figured do it once and do it right so I put about $400 worth of Aeroquip lines and fittings. Which will never fail and look great!!!!

Edited January 7, 2010 by five&dime

[Marty Rogan]

My dad has an L28 with stage III isky cam and is running Z therapy SU's Our dyno guy said that his AF was absolutely perfect with the SU's. I don't think you will have any issues but as stated.... Mikuni's will give you more power and sound incredible when tuned right.

I had someone else tune mine. He didn't have any trouble getting them close but I need smaller jets to lean out the mixture. I am fouling plugs at higher RPM's and losing power above 4k RPM's or so. My L20 made 125 RWHP. Hoping to make 150 when I order new jets from Todd at Wolf Creek next week.

In addition, my mechanical fuel pump couldn't keep up and I had to upgrade to electronic fuel pump. I also figured do it once and do it right so I put about $400 worth of Aeroquip lines and fittings. Which will never fail and look great!!!!

What are you using as a fuel pressure regulator? Do you have any close-ups of the fuel gauge on the firewall?

The Aeroquip lines do look sweet! I have always wanted to put that on my car some day. But $400 for 3 lines, ouch!! I didn't know it cost that much.