Thread: common problems with log manifolds

what are the common problems people are having with the log manifolds on their ve? i really have not read any supporting or offical problems with the manifold and wanted some clarification on why not to run a log on a ve. just wanna see what others have experianced with this so called issue

Power loss, restrictive, horrible flow. I had the same question you had until I went tubular.....night and day!

Log works fine to me. When you're above 500hp you're holding back around 50hp. He red car has a log mani

Ups and downs. What are your hp goals,tuning options and fuel you will be using.
Log I easy to build around ,spacing is ideal and not much custom stuff to make your car turbo.
My hp goal was 450 and a log got me there,all while keeping it simple with a/c thick aluminum radiator and slim fans.
If your ready to pay the price for a tubular(which is the way to go) keep into consideration the type of fans you'll be running along with the radiator.
1.will the tubular fit with little to no modifications. Example smaller Honda radiator required, loss of a/c,etc....
I believe you only have about 8-9 inches between the cylinder head and fans.
If its a race car and you don't care about a/c comforts then a tubular will be easier.
On 2 setups I did ,one went from a de/ve log to a tubular and gained 50-55 whp difference at the same boost level.
The other went from tubular to log and lost 56whp, at the same boost level

There are many pluses on a tubular,just get one that will not become a costly headache to use. You buy an expensive piece and only spend more to make it work sucks.

I personally had a ton of a reversion, which lead to detonation which lead to low timing which lead to power loss. I had stock knock sensor feedback showing me detonation and spark plugs. Right now I'm running a VET tubular T2 manifold, T28 turbo, and VET cams and my spark plugs look white as day with no speckles. I am also making 20 more hp on 4 less psi.

I will tell you what plenty of people told me and I still didn't listen to them (sorry for that BenFenner and Radrigo). You are better off with a T28 with GTiR manifold then a log and a simple T3 turbo.

Was this on a ve motor?

I'm looking for 400-500 but wanted to hear everyone's common issues. I'm going to build my own manifold in the future but going to have to deal with the log for now unless if it feels too restrictive then ill start mine

No. I'm guessing VE Boosting head is more restrictive on a Log than a DE?

If you are looking for that power level you will need fuel better than 93octane to reach it on a log,e-85,110oct,meth injection.and Stick to your stock 2.0 cams