What does the top mount manifold get you over something like a traditional Ram horn?

This is pertinent, because I'm boosting my b16a, and making a final manifold decision.

Sorry if it's a silly question.

however, many will say that its possible to run huge downpipes with a top mount, as well as easier access to the actual turbo vs. a ram-horn

siniGANG

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most definitly not.

92 Civic Hatchback racecar FORSALE/TRADE

partsforsale

If you're going for a street setup, then a topmount is not your best bet. Here is my topmount comparison....

Red is the topmount....Blue is my SLS shorty (current setup)-----both at 10psi
**Setup is the exact same other than the manifolds**

1999 GSR
BW S256 + E85 + built LS/VTEC = 450whp DD
**coming back.....eventually i guess **

***ITR longblock, coated ramhorn, GT3255E, MORE!

http://www.honda-tech.com/zerothread?id=2360258

Okay, so it's most definately not just for bling factor...but you didn't really explain why. I was just about to post this thread, then I decided I should probably search before doing so. Very disappointed with the info and this thread is a month old! So, is there no definitive answer to the question, "which is better; top mount or ram horn"?

Log < mini ram < ramhorn < topmount

Log
-The cheapest of all the manifolds. Log manifolds can easily be made to allow AC and power steering. A log manifold will spool up a turbo rather fast because of its short runner length, but due to it being less than ideal for high volume flow, top end power on a log can be greatly restricted. Logs such as the Inline Pro have a rather good design and ARE able to flow quite well at higher RPMs. A log will work perfectly fine for most street setups...especially stock block

Mini Ram
-Built with a 4-1 collector, mini rams flow better than a log and are still fairly compact and inexpensive. These manifolds are a good mix of short runner design (quick spool) and better flow at higher RPM. This is what i run on the street...i would recommend it for most people who DD their cars, but want better overall flow than a regular log manifold.

Ramhorn
- More equal length than the last two. Ramhorn manifolds have longer runners; therefore, taking longer to spool, but runners are closer to being equal length (better top end flow). Since these manifolds are bottom mounts, it is more difficult to fit a large diameter downpipe or easily manipulate the turbo.

Topmount
-The blingest of all manifolds apparently. A topmount is generally very close to, if not completely equal lenght meaning all runners are the same. This is important because of the cylinder exhaust pulses. Rather than overlapping in a non-eq manifold, in an equal length topmount, all exhaust pulses enter the turbo uniterrupted. This allows the most efficient use of exhaust energy without having deadspots created where there is no exhaust energy in the turbo...even if it is for just a millisecond. Topmounts are generally able to accomodate 4" downpipes and larger turbos due to the placement in the engine bay. For those of us who "need" a Borg Warner S372 under the hood, this is the ONLY choice.

Spool
1. Log
2. Mini Ram
3. Ramhorn
4. Topmount

Overall Power Potential
1. Topmount
2. Ramhorn
3. Mini Ram
4. Log

1999 GSR
BW S256 + E85 + built LS/VTEC = 450whp DD
**coming back.....eventually i guess **

http://www.synapseturbo.com
shop # 518-261-1790

correct, the topmount was designed for a 4inch downpipe with decent flow that didnt have to be hacked the hell up and bent in 120 degree angles to clear in the engine bay.

i saw no difference in spool time on my F-R topmount from my gt35R to my B/P S366 which is considerably larger and non BB

Here's my mini ram (blue) vs topmount (red)

1999 GSR
BW S256 + E85 + built LS/VTEC = 450whp DD
**coming back.....eventually i guess **

Be concise when you say "FLOW". There's a difference between VOLUME, and VELOCITY. Both terms deal with "FLOW", you mean CFM VOLUME when you mean flow based upon this statement. Too many people get a lot of these terms confused as to what "FLOWS MORE". It's not only inaccurate, but annoying.

This debate is about 2 years old. I know you're trying to get more of a serious consensus, but I don't think you want that "dog in the fight".

I doubt that people on this particular thread disagree on these statements, so now its your turn to go to the INDIVIDUAL people via PM, and find out what feedback matches YOUR particular needs.

Besides being able to fit a bigger downpipe in there easier, and the turbo is right there to work on... what else makes it better over say a ram horn ?

I don't buy a manifold change making that much difference in spool. What turbo do you have that was making full boost at 6500 with the top mount? My 372 is making 40psi by then.

First in the 8's....

8.97 @ 166 on 26's
9.27 @ 167 on 24.5's

9.45 @ 158mph

CompetitionClutch.com

IPGParts.com

Hondata

Turbos Direct

9.70 @ 154 mph SFWD Fall Nationals Etown

Got any pics ?

The turbo for both dynos was my GT3255b. The first manifold, the topmount, was a CoreyR topmount. My current manifold is the SLS shorty. Everything else in the setup was left as is....

1999 GSR
BW S256 + E85 + built LS/VTEC = 450whp DD
**coming back.....eventually i guess **