Omex or ACT manifold
Discussion
Will go to Austec soon to do some work on my car. Will definitely go for Bosch injectors and ACT inlet hose. On top of that I'm thinking about getting either the ACT manifolds or an Omex system. My budget can't cover both of them, so what shall I chose?
I think the Omex makes a smoother drive and more low-end and midrange torque; I understand it can also rev higher (will that give more bhp, can the engine take it?) The manifolds are supposed to give 25 lbs extra max. torque and have the bonus of removable cats.
what do you reckon?
I think the Omex makes a smoother drive and more low-end and midrange torque; I understand it can also rev higher (will that give more bhp, can the engine take it?) The manifolds are supposed to give 25 lbs extra max. torque and have the bonus of removable cats.
what do you reckon?
I'm in the same boat. I will have to get the cam replaced this year, but I'm also considering other options, since as others have said it makes sense to get upgrades done in larger chunks, rather than small changes with mapping at each step.
In addition to the cam I'm considering the ACT twin plenum and the OMEX ignition that Mark Adams does. I've spoken to Tim re the plenum, but I've not been to contact Mark to date. Mark, if you're reading, I'd be interested in your wisdom on the when the ignition is appropriate. Also, fellow owners, I'm very interested to hear your before and after comparisons on such work.
Thanks,
Steve.
>> Edited by Steve_T on Monday 14th February 11:15
In addition to the cam I'm considering the ACT twin plenum and the OMEX ignition that Mark Adams does. I've spoken to Tim re the plenum, but I've not been to contact Mark to date. Mark, if you're reading, I'd be interested in your wisdom on the when the ignition is appropriate. Also, fellow owners, I'm very interested to hear your before and after comparisons on such work.
Thanks,
Steve.
>> Edited by Steve_T on Monday 14th February 11:15
I have the ACT silicon inlet pipes, 45mm Ally trumpets and enlaregd Throttle, which made a hell of a difference just by doing that.. also just purchased Tornado Chip from Tim at ACT too but gotta get book MA to do his stuff to get the best out of it.
I think Tim said in the past that just the inlet pipes themselves can give quite good gains, forget what figures he said but one of the cheapest power gains bhp/£
BB
I think Tim said in the past that just the inlet pipes themselves can give quite good gains, forget what figures he said but one of the cheapest power gains bhp/£
BB
Steve_T said:im having the 404 cam fitted at the end of the moth,but mines with hydraulic lifters.also having compression raised slightly(10.5:1)inlet manifold porting finished(tvr only do half of it),45mm trumpets,and the pre-cats removed.as you can see all this is being done as the heads have to come off anyway due to the new valve springs.so this makes for maximum improvements for minimum labour.the enlarged(72mm) plenum,afm,hoses etc can all be fitted easily later.id choose the omex before the different manifolds also.the distributor is pretty limiting once you start modifying.
I'm thinking of staying with a hydraulic setup, because I prefer the convenience. I figure that if it flows well with the ACT plenum, it should still make good power.
richb said:
Sorry to resurrect an old thread chaps, but have any of you now had the OMEX ignition system fitted? Rich...
Rich I've had the OMEX 150 system fitted best part of a year now, not always connected though
. I knew it improved things no end but it wasn't until recently when I had a fault with it and reverted back to the dizzy did I fully realise what improvements it gives my car
. I can now say that without a doubt it sorts out most of the low rpm/light throttle manners, but not eliminate them totally.
It really lets the car rev freely. I could not believe how crisp it makes the throttle response, it flys up the revs like a tuned jap 4 pot not like all the other lumbering V8s
IMHO. As they say its not until you don't have something do you miss it, mine was missing for a week and there is really a large difference in the car on the road
. I would say if you have a standard car which is more than happy with the dizzy leave it. If not then get the Omex
, works for me . Harry
PS speak to Mark and or Paul at Austec they have done a few Tivs now, with mine being the first/prototype, so the developement expenses have been spent by someone else
.... edited to add a PPS....As for the manifold, again I have a similar thing on the V8S, but different
. It made a big difference, so much so, Tim had the confidence to go ahead with the griff/chim one based on some of my experiences . tbh he was already there but not in production . >> Edited by HarryW on Wednesday 30th March 19:14
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