Nice intake manifold... - The ITB thread
Just took them off and and dynoed it again. No changes other then the filters. It picked up 40 horse and 40 torque. So the filters were restrictive. The tune was completely off without the filters also. But we are still down on power from the fast.
What else would they use, Alpha-N?
And if you'd read the thread, we already answered your question anyways.
And if you'd read the thread, we already answered your question anyways.
Originally Posted by Aaron
Most ITBs have either a vacuum line running from each TB bore, or a single vacuum line from each row of TBs. Mine are setup to have a single vacuum port from each row of 3 TBS, so I have 2 vacuum ports total. All I need to do is take both ports, and run a line to a common vacuum plenum. From here I can attach the stock MAP sensor, and all of the other vacuum operated systems (PCV, brakes, FPR, IAC, etc)
Staging Lane
Joined: Jun 2005
Posts: 67
Likes: 0
Originally Posted by 30thta436
I did if I turned down the idle stops to far. Which I did, but then turned them up a little. It doesn't stick at idle, but on the dyno I did notice that it stuck at wot for about a split second. It scared me at first, but It may be just me. I got it to idle at 950 perfectly. It took alot of adjusting, but I got it there. I turned it down to 900 and it idled there, but the iac was completly closed. Even with it closed all the way it still idled perfect, even when driving and coming to a stop. I turned it back up to 950 for now and will mess with the idle again once all the other problems are sorted out.
Have you driven yours yet? This one feels like it has a miss just off of idle. After that it feels fine.
Have you driven yours yet? This one feels like it has a miss just off of idle. After that it feels fine.
I'm seeing the same disappointment from this intake though. Mines a 408 w/ ETP 245 heads and a 247/252 .646/.644 113+0 cam. The best they could see was 460 on their Mustang Dyno. The car made 480 with a much milder cam and a Fast setup. This is also wide open with no filters.
Originally Posted by topperge
We haven't driven mine yet, GTPPrix and Kirk at Vector are my tuners on the car. They've been dealing with the issues and I've been pulling out my hair from Virginia. As long as the intake stays warm the blades don't stick, but after a night the blades have to be tapped to release and open back up.
I'm seeing the same disappointment from this intake though. Mines a 408 w/ ETP 245 heads and a 247/252 .646/.644 113+0 cam. The best they could see was 460 on their Mustang Dyno. The car made 480 with a much milder cam and a Fast setup. This is also wide open with no filters.
I'm seeing the same disappointment from this intake though. Mines a 408 w/ ETP 245 heads and a 247/252 .646/.644 113+0 cam. The best they could see was 460 on their Mustang Dyno. The car made 480 with a much milder cam and a Fast setup. This is also wide open with no filters.
There are guys in aussie land makgin power with these things... I dunno what they are running for cams and whatnot, maybe a phone call to soeone over there might be a help... I'm sure they would be willing to tel you what they are running, or try calling harrop, they probably can steer you in some direction with it.
Disturbing results from teh fliters though.. I can't believe they were that much of a restriction... kinda makes this piece even more of a track only setup, driving around on the street with no filters at all... risky at best IMO. One dust cloud/peble and you're gonna be in for a bad day.
Disturbing results from teh fliters though.. I can't believe they were that much of a restriction... kinda makes this piece even more of a track only setup, driving around on the street with no filters at all... risky at best IMO. One dust cloud/peble and you're gonna be in for a bad day.
https://ls1tech.com/forums/showthrea...=473973&page=1
here is post about the harrop. I still think its not as great as everyone thinks it sounds like a myth. At first I thought they would be good but after more research I found nothing but ****. I dont think a cam change is going to make these cars pick up 150rwhp.
here is post about the harrop. I still think its not as great as everyone thinks it sounds like a myth. At first I thought they would be good but after more research I found nothing but ****. I dont think a cam change is going to make these cars pick up 150rwhp.
There's no way these things are a myth. They'll easily outflow any other manifold on the market. Just the surface area of these intakes over a treaditional FAST style or sheet metal is much greater. 8 x 52mm tbs vs 1 x 90mm, dee de dee. The problem is that so little are custom made to an application. Most are mass produced and not set up to the car they're supposed to be on, they're universal for the engine. Hence all the problems with the Harrop. These intakes just have little problems that needed to be sorted out.
Originally Posted by Beaflag VonRathburg
There's no way these things are a myth. They'll easily outflow any other manifold on the market. Just the surface area of these intakes over a treaditional FAST style or sheet metal is much greater. 8 x 52mm tbs vs 1 x 90mm, dee de dee. The problem is that so little are custom made to an application. Most are mass produced and not set up to the car they're supposed to be on, they're universal for the engine. Hence all the problems with the Harrop. These intakes just have little problems that needed to be sorted out.
i think one big issue is that US cam designers don't have much experience with ITB. the Aussie guys with years of experience with these have some downright wicked cams that are way out of the realm of the US cams.
still doesn't explain the big power loss
still doesn't explain the big power loss
Originally Posted by Phoenix 5.7
i think one big issue is that US cam designers don't have much experience with ITB.
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
i think people think you can just stick these intake on and drive away! you cant!!!
ITB need setting up propperly. each cylinder needs blancing out and the linkage often needs quiet abit of time sepent on it to get it right!
as for mass produced kits not working?? CRAP! there a a **** load of "bolt on" throttle body kits over ehre (most for 4pots for use in kitcars) and with the riught setup they work AMAZING!!
by the way ITB are not the best method! roller throtles are better (they leave nothing in the intake track at full throttle!!) but are more exspensive!
thanks Chris.
ITB need setting up propperly. each cylinder needs blancing out and the linkage often needs quiet abit of time sepent on it to get it right!
as for mass produced kits not working?? CRAP! there a a **** load of "bolt on" throttle body kits over ehre (most for 4pots for use in kitcars) and with the riught setup they work AMAZING!!
by the way ITB are not the best method! roller throtles are better (they leave nothing in the intake track at full throttle!!) but are more exspensive!
thanks Chris.
Staging Lane
Joined: Jun 2005
Posts: 67
Likes: 0
Originally Posted by Cliff
What I find interesting; I would think employees from Harrop would jump in this thread and help out with the issue we are having. Customer service and technical help would be wonderful. The faster we are up to speed on their intakes the more f-body people would buy their product. They are members of LS1tech but they never give suggestions or tech help.
I'm sure Ken (Tuf383) will jump in here shortly.
