What MOD next? TT or SC?
 

Hey guys, I'm thinking of getting another MOD for my Z. So far, the only MOD I've made are my exhaust. I got the HKS exhaust with custom test pipes. What MOD should I do next? I was thinking of getting the Greddy Twin Turbo as my first choice but the Supercharger sounds tempting as well. I've not gotten intakes because if I get the TT or SC, intakes are already provided. Should I do this MOD? Or should I do other MOD first? If so, what? And if i get the TT or SC, what other MOD should be included. (There are no race tracks here but there are street drag races).

Thanks in advance

Before everyone else says it: do a search and read through the many posts in this forum and then you will probably have a good idea of the virtues of the various FI mods available for 370Zs.

Twin-Turbo > Supercharger

What are your power goals?

I use my car daily and would also want a little more power in it. Most of my friends drives Evo's and when we're having some fun, it's pretty hard for me to catch up. I don't want to overtake them but want some power that can keep up with them. I also think about the TT as it will cost a lot for maintenance in the near future.

I say get a gtm s/c and get 400+whp.

:iagree: If you just want a bump in power then 400 whp with an SC should be good. TT will give more but also cost more and has some heat issues associated with it. You may want to buy an oil cooler first. Either way you are going to need one.

What about the Stillen s/c? I'm leaning towards the s/c now. I know the TT will give me headaches one day.

Isn't an oil cooler included in the kit? Other than that, what other things are necessary? Everything in my car is stock except the exhaust and HFC(custom test pipes)

The oil cooler is separate. Also might need some gauges. you already have the exhaust so you wont need much more for the performance side of it. There is a ton of info on here about the Stillen and GTM SC kits.

If you are just daily driving the car then as long as you have a oil cooler then heat really isn't an issue at all.

I have the 34 row cooler with my TT and never see temps above 220. Even on a 90+ degree day after some spirited driving.

I don't know about the Greddy kit but GTM has many different options for either the TT or SC.

You can get a turn key kit that has everything that you need to get running or you can mix and match to your preference.

And as far as extra maintenance for a TT, maybe years down the road there may be more issues, As far as regular maintenance the only thing I plan on doing differently is changing the oil more frequently.

If you install the turbo setup correctly, get a good oil cooler, and have it tuned right, it will be just as reliable(or more reliable) then a S/C kit. S/C tend to build more heat on the intake side and are usually less efficient per lb. of boost.

I didnt really think the evo's would be faster than the Z... figuring they are modded as well with higher boosts?

Yup, they are all modded and has got high boost. Their turbo gives the extra push they need.

Yea thats what i figured. Well, you have some options but unfortunately are probably much more expensive that your buddys adding some boost to their already turbo charged cars...

I'll definitely be spending a lot more than them. That's the disadvantage of having a non turbo car. But i'm leaning more towards the S/C kit. Do you think I can be at the same level as an Evo after having the S/C kit?

if $$$ isn't a big issue, I would go twin turbo.

:iagree:
That way you will ensure that your buddies' evos will only see your tail lights from now on :tup:

but money is a bit of an issue. it's an extra 2k for the twin turbo. not to mention buying other things like cams/pistons etc.

remember that stuff WILL break, its only a matter of time. 10k for a turbo is great, however you WILL end up spending more than that fixing things. a TT installed will prob run you are 15k, however plan on spending much more down the road as stuff begins to break and things need to be replaced.

same thing goes witht the SC

You do not need that stuff right away.
Yes the motor will wear faster, but it is not an immediate need.

If there was such a thing as an immediate need it would definitely be an oil cooler and if not AT a twin disk clutch to take the punishment

I went through the same process and decided on the SC. 400 WHP rocks in our cars and the kit was cheaper, simpler, and easier to install than the twins (although they are awesome too). Find some good looking women and ask them which is better, the Evo or the Z. Believe me, they'd rather ride back to your place in the Z than go to the grocery store with the Evo guys!

That's cool. I know the twins are awesome. But money is an issue too. And i have got to agree with you with the women. Well said! Haha

Haddy what s/c kit did you end up going with?

Do you want to upgrade your tranny too? The S/C gets you close to the max HP/ TQ I'd be comfortable with on a standard tranny (auto or manual). TT gets you in the higher HP/TQ ranges but you will probably want to upgrade the tranny as well. The SC brings on power slower w less TQ so it's not nearly as hard on the car as a TT setup is. If your goal is to get well up in the HP range, skip the SC and go straight to TT.

Not planning on upgrading tranny.

I've decided on getting the GTM S/C kit. Hopefully I'll be getting it by next year. Still saving up some $$ though. Can't wait!! Are you planning in getting one?

Yup, doing research but I'm leaning more towards S/C over TT only because of cost and the S/C gives me the horsepower i'm looking for. Now its just of matter of preference GTM vs. Stillen. Any opinion is welcome...

No need to upgrade the tranny if its a manual 6 speed.All you would need is a clutch and CSC upgrade if you have a auto thats a different story.

To the OP what is your budget and power goal's ? A SC 370 with 400whp will hang and beat a lightly modded evo. But if one of your friends decides to go get a bigger turbo your going to need more.

Hmm, how much power those evos put on the ground with bigger turbo?

It all depends on witch Evo and turbo evo 8/9 can push more on stock blocks than the newer evo 10's.They can make 400-500whp depending on witch turbo they choose ,500whp would be pushing it on a stock block evo 8/9.I have a friend that has a evo 8 build motor 550whp low boost just for the street on a 35R turbo his high boost is 725whp.There isnt even a 370z that has even come close to making that much power.

The Evo has been around forever though, we will get there. Also, I kinda disagree that a lightly modded evo will keep up with a 400whp 370z. Lightly modded is probably like stage 2, maybe 350whp. I've been in many evos at varying stages of power. Driven them stock, stage 2, and with a 30R and 450whp. I think It would be a nice race with a 30R evo8/9 and a SC 370z. Of course they can ramp up the boost, but they still have pretty bad lag from the 2.0. Hell they lag bad even with the miniature stock turbos.

If the GTM S/C claims 550 hp, wouldnt that add up to more than 400 whp on the car? just curious but I thought the conversion was roughly 15% from fly to wheels....

My budget range is only up till the S/C kit. The turbo kit is out of my budget. Currently I'm on 316.5 whp with HKS exhaust and custom test pipes. My goal is to reach at least 400whp on my 370.

I'm curious how the conversion is with the hp and whp. I know it's different for auto and manual transmission.

You are correct that drivetrain loss is somewhere between 15% - 17% on a manual transmission Z. The big part you are missing is the torque difference between a tt and sc Z. The hp numbers are similar but the sc makes power higher up in the rev range. TT makes power in the middle of the power band and makes more torque.

HP = (Torque x RPM) / 5252

In general torque is king in a drag race. HP comes in to play at top speeds. In short if both a tt Z and a sc Z have 550hp, the tt Z will have more torque and be faster in a straight line. The benefit to me of the sc is that the power curve resembles that of a stock Z and retains driveablity on a road coarse.