hi all im looking it to getting this mod done but i heard on here somwhere that psd never quite got them to work right? has anyone got a 51mm throttle body on their car? who done the mod for you ? and do they work right?
thanks in advance
steve
I've got a PSD one, it quite often sticks open at causing the revs to hunt at idle. I know others with the same throttle body that do the same thing too. It's not a massive issue as a blip of the throttle sorts it out but I can imagine it'd be annoying on a car used daily.
Not had a problem with my PSD 49,5mm TB, well after the first trip though. I got the one from Liams car, and he had driven it for quite some time. The throttle got stuck at wot whilst me and Beavis was chasing a Cossy Saph. Not a kool thing when I tried braking for the roundabout lol
so thier is an issue with them but its just to butterfly sticking a lil? that should be easy enough to sort with a lil fettling
steve
Exactly the same a Hayesey, got a PSD 51mm one which occasionally sticks but no big deal...
What causes it to stick open?
Speak to juan off the forum. He got in contact with me about 51mm conversions.
Hope he doesnt mind but this is what he said to me in an email:
*EDIT*
Juan is banned from this forum, as he is a crook, and he was told he could use the forum but not trade (as i personally had an issue with him ripping me off), and you have just shown us that he disregarded what we said, and continued to PM people offering his shonky services. - Dknight
ive edited your post above mate, if he sells them and they work then that is all good for the people who have bought them, but if you try getting any after sales support you get a very narky rude little bastard, who will no doubt tell you to go F*uck
My views on the issue with these, if it was a simple fix to fix the sticking open problem, surely psd would not have gone to such trouble and then stumbled at the last easy hurdle?
be interesting to see what causes it tho
i never contacted him through this site. im in 2 minds as to go through getting one from him or not now but if i pay through paypal and he dont deliver i can always claim my money back through them cant i?
yeah you can claim it back sure, if you cover yourself, it doesnt really matter!
can i still claim if i send the money stating that it is a gift? as he siad say it is a gift so he does not get charged for it???? or am i better off adding a few quid more and doing it right
steven
Ah thankyou for bringing that issue up as i was not aware of this. Thanks DKnight.
ah the boy never changes, he is doing it as a service, if you click as a GIFT you get no chance of ever claiming it back.
i have emailled him asking if i can send the money via paypal as a service instead of a gift as at least then i have some cover if it all goes tits up
steven
Quote from: poloeatonm45 on November 02, 2009, 12:13:30 PM
so thier is an issue with them but its just to butterfly sticking a lil? that should be easy enough to sort with a lil fettling
steve
I have never had an issue with this later, and this was in 2001 or 2002. Mine is slightly smaller though
i didnt have a prob with mine, i think its due to the butterfly somtimes catching ever so slightly - being off centre.
Quote from: poloeatonm45 on November 02, 2009, 11:06:42 AM
hi all im looking it to getting this mod done but i heard on here somwhere that psd never quite got them to work right?
In my experience, he couldn't even produce them. Steve the Pr1ck still owes me the money for one of these, although I can't imagine I'm the only one ::)
Quote from: PeteG40 on November 03, 2009, 09:19:45 AM
i didnt have a prob with mine, i think its due to the butterfly somtimes catching ever so slightly - being off centre.
Can it be machined so it doesnt catch? Going to ask afew companies around here if they can do mine. Just need to arm myself with as much info as possible.
down to adjustment and the quality of machining on the butterfly i think.
Like i said i never had issues with mine from PSD
I've been looking to get one done for a while!! I'll keep an eye on this topic. Someone must be able to get these made up - especially if we could get a batch of 5 together??!!
From what ive heard and experinced about Juan i wouldn't give a penny to the scheming bastard!
persionally i think he's way overpriced anyway,
Seems to be lots of bitching going on in this thread, don't really know the history on this, but guys sort it out elsewhere?!
Anyway if its the reason behind sticking 51mm(or any oversize throttle bodies)butterflies is still the topi of discussion then I'll continue. I believe the problem lies in the shut angle on the edge of the butterfly itself, any OEM butterfly will be machined to an elipse, with the oposite sides displaying apposing angles that will seat completely flat on the throttle body inner wall as it closes. This allows a good seal allowing the bypass valve and idle stabalisation valve to do its job properly. Many of the modified THB(mine included) seem to have a square edge to the butterfly meaning the the butterfly valve does not close cleanly on the THB inner wall, and quite often beyond the throttle posistion sensor close position meaning a tricky set-up. So to the reason for the sticking open phenonemon is because the geometory to the closure is not correct, which leads to it sticking from time to time.
To Fix it you can either machine a new butterfly correctly( not easy if you don't know the specifications) or depending on availibilty to doner spares fit a butterfly from another engine which meets your THB size. I'm still looking out for something suitible, but basically anything with 51mm standard THB would or should do the trick. I'm yet to find anything suitible, but tbh I've not looked that hard because Idon't see it as a major issue.
Yep, problems are caused by the chamfer (sp?) angle on the edges of the butterfly. This needs to be done on a lathe rather than with a file.
I have got a 51mm throttle off an Audi to have a play about the butterfly with. Need to get the verniers on it though as my G40 one is bored out to 50.8 mm.
Not sure how you'd chamfer that edge on a lathe. A miller would do it though ;)
I assumed lathes have come on leaps and bounds with computer control since the days in 1992 when i used one in metal work class ;D
You can make the butterfly on the lathe at the correct angle.
I started to read this thread and new straight away that the edge of the butterfly was at fault. I dare say some will have been Laser cut to start with.
If you have a standard throttlebody then you`ll know having looked at the Butterfly with wedge how its done as said already.
If a mandrel was to be made to hold them in a Lathe chuck via the screw holes then a preshaped tool ground finely then i`d say that would work to form the chamfered edge.
It`s what i would try anyway.
Maybe i will at somepoint ;)
Fred.
i've just started making Nick his butterfly which he asked me for a few weeks ago, up to now i have turned a peice of bar to 2" and parted off a piece 2.5mm thick. this is now going to be surface ground to 2mm then marked and drilled, the chamfer will be turned on after using a piece of bar 1.75"dia with an angle milled on the end, i will then bolt the butterfly to this and using the compound on the lathe apply the angle, in theory this should work fine, i just need to calculate the angle for the bar (45 degree i think). also whilst on the subject i noticed that the origional vag throttle body butterfly does not seal completely, nor does the butterfly on the boost return (if held to light you can see round it).
Quote from: tdh-syorks on November 04, 2009, 06:58:30 PM
i've just started making Nick his butterfly which he asked me for a few weeks ago, up to now i have turned a peice of bar to 2" and parted off a piece 2.5mm thick. this is now going to be surface ground to 2mm then marked and drilled, the chamfer will be turned on after using a piece of bar 1.75"dia with an angle milled on the end, i will then bolt the butterfly to this and using the compound on the lathe apply the angle, in theory this should work fine, i just need to calculate the angle for the bar (45 degree i think). also whilst on the subject i noticed that the origional vag throttle body butterfly does not seal completely, nor does the butterfly on the boost return (if held to light you can see round it).
If it helps mine didn't steal completely either. Must be standard.
The butterfly on my 51mm TB is shocking. One side fits ok and the other has what looks like 0.5mm gap at closed position when held up to the light.
Tom, that way of putting the angle on the disc should work fine. Dom does it a similar way.
cheers Nick, ill give it a try :)
Hmm, surely a gap around the edge of the butterfly can be compensated for via the idle control screw?
Exactly the case with mine, idle screw fully down and it still ticked over high.
I see. Just checking i'm not losing it!! Lol...
hi just to let people know i,ve just had my throttle body enlarged by jaun and he has done a great job and in good time aswell. i know some of you have given him a bad review but in my case he was really good to deal with and i also know someone else that has just had their throttl body done also and he had a really good service from him also
just my two pence worth
steven