Speed94

I tried searching, but came up with nothing.

Whats the diferences, advantages/disadvantages of a 4 bolt versus a 5 bolt turbo? I know downpipes for 5 bolt turbos are more money so Im assuming a 5 bolt is inherently better? Im looking to boost my civic and not really looking to go crazy. Dont wanna touch anything internally cept maybe headstuds. was gonna go B, but I already have a boosted B so single slam it is. Thank for the input.

Rickdrizzle

5 bolts are generally for turbos with internal wastegates. I personally like the 4 bolts better.

TheShodan

iTrader: (14)

That 5 bolt came originally from the ford mustang SVO, and was almost top mounted by design. That 5th bolt on the end is going to be a bitch to keep in there, plus, depending upon the manifold, it might make things a little tight against the block for the Downpipe.

4 bolt is much easier.

SOHC_MShue

i prefer 4 bolt

pwrofdrm

Well for one, the design of the exhaust manifold which you're using will determine whether you need to run a 4 or 5 bolt downpipe. For example, the Inline Pro T3 manifold requires that you use a 5 bolt downpipe for clearance purposes.

Don't buy a turbo until you decide which manifold you're going to be running...and don't make a decision on which manifold you want based on the turbo exhaust housing outlet bolt pattern.

Speed94

gonna do a Spoolin setup, I just didnt know if there was any advantages or disadvantages from a 5 bolt to a 4 bolt.

0project dc2

iTrader: (1)

specify 4 or 5 bolt when ordering because the fitment is off by 1/2 inch

most 4-bolt turbos will not fit cast manifolds

TheShodan

iTrader: (14)

Fitment for the manifold and downpipe are the main "issues" that I've found. I personally hate the 5 bolts when it comes to installation

Pick the turbo around the manifold. Some designs don't flow the best in a 5 bolt exhaust housing when you go larger than a midframe sized turbo. 4 bolts come in more combinations and are less expensive. Even the standard T3/T4s. The 5 bolt exhaust housings are a bit more expensive than the 4 bolts, and your choices are a little more limited in terms of availability for replacement.

-Trinitron-

Everyone has pretty much covered it. No "advantages" per say. I personally chose a 5 bolt, because I wanted to use an inline pro manifold to keep A/C in my EM1. Having 300 whp with cold air is a nice combo!

carrnut21

It is possible to fit a 4 bolt on a log or cast manifold and still keep your A/C, its just a lot of work to make it fit

0project dc2

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carrnut21 &raquo;</TD></TR><TR><TD CLASS="quote">It is possible to fit a 4 bolt on a log or cast manifold and still keep your A/C, its just a lot of work to make it fit</TD></TR></TABLE>

only on certain manifolds


the drag/blox/ugr/ebay ones will never support a 4-bolt

92redhatch

i hate my 5 bolt turbo. what a head ache. but since im using a ac friendly turbo setup with a 62-1 i have to use a 5 bolt. if i had to start all over i would go v band.

da_dude

Yes, the only reason I'll keep the 5 bolt is if you are planning on keeping your AC. Otherwise V-band FTW.

carrnut21

I am running a revhard cast with a garrett t3/t4 4 bolt with the hot side of the drivers side.

TheShodan

iTrader: (14)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by project dc2 &raquo;</TD></TR><TR><TD CLASS="quote">only on certain manifolds
</TD></TR></TABLE>

I was just going to mention you


Modified by TheShodan at 8:56 AM 7/31/2008

00si2

This is the first that ive heard of a 4 bolt not fitting on cast manifolds. I have a inline pro manifold and am looking to get a 4 bolt turbo (T3/T4e 57 trim .63 a/r). Can someone explain what the fitment problems are. On, and i plan on keeping my ac.

evosix

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00si2 &raquo;</TD></TR><TR><TD CLASS="quote">This is the first that ive heard of a 4 bolt not fitting on cast manifolds. I have a inline pro manifold and am looking to get a 4 bolt turbo (T3/T4e 57 trim .63 a/r). Can someone explain what the fitment problems are. On, and i plan on keeping my ac. </TD></TR></TABLE>

x2 i need to know also, up for answers

0project dc2

iTrader: (1)

the turbo sits a little bit farther to the left and sits in wards to the block when mounting it conventional ac side


on the inline pro manifold it can be made to work given its an e-housing turbo ( 3 inch inlet 2 inch outlet compressor housing)

youll have to grind off ALL off the webbing and then some.


the inlinepro manifold is one of the only 5-bolt cast manifolds i've seen to work successfully for the most part.

but be prepared to grind the crap out of your block to clear the turbo

00si2

So with the turbo that i am going with, it will fit but im going to have some grinding to do. Or do you recommend going with the 5 bolt instead.

It wouldn't be a big deal but i already purchased my downpipe and manifold and id like to stick with the 4 bolt if at all possible. Thanks.

TheShodan

iTrader: (14)

What people are forgetting to mention on the Inline Pro manifolds, is that putting a 4 bolt turbine housing on a manifold that is designed for 5 bolt will cause you to do the serious grinding. Inline Pro also makes a manifold for the 4 bolt turbine user, so the grinding isn't as necessary for those using an "E" sized compressor cover.

Stick w/ the 4 bolt, as there are more manifold options that utilize that turbo with that turbine housing. that is easier to remove in the long run.

evosix

i bought a 4 bolt garrett in haste and my goal was to able to use ac and i have blox manifold.

Anyway, what if I switched the 4 bolt turbine housing for a 5 bolt? Will it fit better then?

evosix

bump!

TheShodan

iTrader: (14)

Possibly.. I've fit plenty of AC compatibles on 4 bolt turbine housings. It was all in how the downpipe was fitted.