Chaotica7

Has anyone done this? Does it do any good? If so, how much good does it do?

Thanks for any help!

Rotary93

I was thinking the same.....Back in my 89 Mustang days I had it done....Liked it alot....

0piston

iTrader: (9)

I got this done along with a nice street port at my last rebuild. very noticble power range from 4000 and on, but it was most likely due from the street port combination than anything else.

Crusader_9x

my friend has a 99 svt contour with 205hp from the factory. a cougar from the same year with the same motor but without extrude hone and little smaller cam makes 170hp. so on a 2.5 v6 it does alot for hp so on our cars it should do a number

Chaotica7

Interesting... Thanks, guys!

fc3s94509

i was going to do this to my 87 turbo but i was told that it does not make that much differance with a turbo, why im not sure. thats just what i was told.

MeLoco

I spent considerable time on the phone with extrude hone discussing cost, HP ,etc. I still think if it can give you 10% HP increase for the $600.00 it costs it would be worth it. How many people spend that much or more for 10% increase for a exhaust. I was told they have seen anywhere from 10 to 20% depending on mods and what else was extrude honed. If your going to go through the trouble get it gasket matched.

Trout

I asked Chris at RP if this is worth it for a street car or just drag since Ari did it to his car. He thinks it's worth it based on a car with the extrude hone intake that they dyno'd, car had all the bolt-ons using a high flow cat and made somewhere around 335-340 rwhp at 13 psi where that set-up would usually dyno around 315-320 rwhp with a high flow cat.

Can't wait to see what it does for mine with a mid-pipe.
Jack

Maxthe7man

It seems alot notice a power difference with extrude honing when combined with other speed parts or modifications, on its own though it seems to do very little. Extrude hone doesn't have eyes really of its own, while it will remove casting flash and what not, it can't really concentrate on the area of the port where the port needs the most help.
I read alot of car magazines of all types, and when they break the power gains down from various modifications, the extrude honing does little if anything besides make the ports "look" nice, the articles usually end by saying you could for go the extrude honing for the 3 hp gain at 6000 rpm and the 700 bucks its costs, I have a few engine build articles where it even made less power than an unported engine... I would chalk it up to being a gimmic and thats about it, spend 60 bucks on a better airfilter for about the same hp gain...Max

Rotorious7

iTrader: (1)

Its worth it for N/A. Boosting save your self 600-800 bucks and turn 1lb boost to make difference on turbo car.

fastrotaries

The gain Vs the cost is slightly better than a cat back does for an FC. That 's usually the first thing people do. I ahve 207 @ the wheels and the day after i got mine Dynoed a guy with less bolt on than myself got a 220. He had his intake E/H

ExFastWS6

ok well what about for us guys that have EVERYTHING! i mean yall say get this or add boost.... well what if i have the catback, the midpipe, downpipe, t78, boost controller, tuned power fc, the k&n, huge apex-i intercooler, built 3 mm street ported motor and etc, etc, etc... to me this is like one of the last things i can do besides go to a small bridge port(which is where im headed)...does this then mean that to me its worth the extrude honing process? what would I gain since i have so many otehr mods already? or would it be better to have a custom intake built? what about a cosmos intake? better? or even past that a extrude honed cosmos intake? answers greatly appreciated although i cant help but notice not many members try to push the edge of squeezing every last drop out of their 1.3liter rotary and jsut quiting after they have bolted on the standards stuff everyone has...

80-CU.IN.T

The intake manifold castings for a 3rd Gen are good. The only real problem is the miss match between the upper and lower manifold. Pin them togther and port match for about 2" and you will see the most gains. In a Turbo / Supercharged engine I don't think you will see any significant gain because manifolds are pressurized. ( Air being forced though as opposed to being pulled through because of piston or rotor movement.) You might see a difference in back pressure for the turbo though. How much is a good guess.

I ported, polished and Extrude Honed my upper and lower manifolds. I talked with Extrude Hone's PA. office for about 15min on the phone. Jim I think. Told them what I was going to do and that I worked at XXX shop who at that time had several articles every year written about them in V8 magazines. ( Know the owner very well ). I also told them I wanted my upper and lower manifold Extrude Honed when they were bolted together. They said no problem ( $85.00 ). I took my manifold to the Paramount, CA office. I was told 10 day turn round. Well after 3 weeks I called them. I was told they were too busy. After 6 weeks I was told that they would not Extrude hone the upper manifold bolted to the lower. They would only do them separately. This kinda pissed me off because I had already pinned ported and polished the upper and lower manifolds. I said screw it and do it. 1 more month later I got my manifolds back. It turns out they had to make a jig for the manifolds and were waiting for a few more sets before the were willing to make it cost effective. They also tried to give me someone elses upper manifold.

I then sent my lower intake manifold to Jet Hot Coatings to have it exterior coated with Jet Hot 1300. Jet Hot then bead blasted the inside and outside of my lower manifold removing the smooth Extrude hone surface. What is a guy to do. I then re-polished the lower to just before the fuel injectors. The bead blast I thought would help to keep the fuel atomized.

80-CU.IN.T

I also forgot to mention that when I sent my manifold to Jet Hot, I spoke with the rep and specifically told them not to bead blast my freshly machined surfaces and not to apply coating to them. I also stated this in a cover letter I sent with the manifold. Yup they bead blasted the surfaces but didn't apply the coating. I had to re-machine all the surfaces. PIA - SHT-If I did that kind of stuff when I worked for other people I would have been FIRED. But WTF.

ExFastWS6

man thats some bullshit...i woulda whooped an *** or two!