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#15
by
shortysclimbin
on 06 Apr, 2010 09:51
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???Kevin / roids:
I really do not see what your problem is; I think maybe it is something that I was unclear about. I was stating for the guy to use a full tdi block, pistons, head and use the fuel system from an IDI. That gives you the ability to have the benifits of higher lift cams, larger valves, bigger pistons, and stronger blocks. That and you do not need to modify an electronic tdi fuel pump to get things to work. I would love to see your info on why this would not work?
Secondly, Dave Cross, (passenger performance) offered up for a short time a REGRIND cam that boosted performance a little bit, but due to its nature it reduced the base circle of the cam. The cams I have are custom billets designed for TDI engines with 260/260 11mm lift specs, but should fit with some piston clearances in a idi engine ( I have yet to confirm this on engine but did confirm it in a idi head).
Finally, your not very polite even IF I made mistakes. Plus, If you are not careful you might scare away someone that may know something more than you might (even if thats not me).
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#16
by
Rabbit on Roids
on 06 Apr, 2010 10:15
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ok, well maybe you might have something going there. either way tho. you dont just bolt a mechanical fuel pump on a TDI. sorry to rain on your parade. sure, it can be done, but its not easy or a bolt on affair. i still want to see dyno sheets for your 250+ horsepower engine. and really, why are you bragging up TDI engines in the IDI section? thats why everything was so un-clear. there is a TDI section for TDI engines, so we dont get a huge mix up like this.
oh yea, i dont have a problem, its just that most people that come on here making claims like you, have absolutely no hard evidence to back anything up.
another thing, we cant really cut valve reliefs in the tops of our IDI piston tops. it will weaken the piston too much probably. our IDI engines are a completely different animal from the TDI's you work on.
sorry for attacking you, but you came into the IDI page, and started telling someone about using a TDI block to make better power. we kinda try not to discuss too much TDI stuff on the IDI page, because people get confused and things like this happen. either way tho, dont take it to heart too much, i was mostly being sarcastic on that first post. and sorry i called you a dumb ass. i guess it was kinda me being a dumb ass cause i couldnt understand what you were trying to say. i thought you claimed to have bolted an IDI head on a TDI block and made it run. thats why i called bull$#!t on it.
another thing, if you can make custom cams like you say, make one up for an idi engine, people from this forum would buy them if you could actually make a cam that made a noticeable difference over stock and didnt cost an arm and a leg to buy one.
tell me some more about the cam you made. any overlap or anything like that?
another thing, i really dig the mono wiper conv you did to your car.
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#17
by
Vincent Waldon
on 06 Apr, 2010 10:15
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Yuppers, we're all here to learn from each other... let's 86 phrases like "dumb ass" please and thanks.. unless you are referring to me and the extra holes I just "accidentally" carved in my fresh drywall.
A wise man wrote "seek first to understand"... if something seems a bit wonky let's start with the assumption that we're not on the same page.
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#18
by
Rabbit on Roids
on 06 Apr, 2010 10:17
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wow, thats a first...
I said that im SORRY. that kinda amazes me.
and yea, we were on 2 different pages here. not now tho...
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#19
by
truckinwagen
on 06 Apr, 2010 10:25
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another thing, we cant really cut valve reliefs in the tops of our IDI piston tops. it will weaken the piston too much probably.
if you remember Aki machined the whole top off a set of AAZ pistons and then cut valve reliefs in them.
I think there should not be too much issue cutting some off our piston tops, there really is a fair amount of meat on them(they withstand crashing into a valve pretty well)
I too would be interested in a hot cam for the IDI.
I plan on playing around a little with some conservative gasser cams and see what happens...
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#20
by
shortysclimbin
on 06 Apr, 2010 10:42
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Kevin,
I would be interested in what makes the pump not bolt on. I am assuming you mean the mounting? I have a Cummings 12mm pump that I retrofitet idi parts on that I was planning on putting on a very interesting engine setup for a 4 runner. Any info would be great... You see to me bolt up means something my welder, plasma cutter, and mill might have to touch
. plus making a pump fit is easier to me than machining 4 pistons to +- .05cc.
truckinwagen, I have a few mild gas cams I started with that I might be willing to get rid of. If you also have a spare engine I would be able to work with you on getting a set of pistons sorted out and maybe a cam. PM me if you want more details. I started out with a pp idi cam in my tdi, then I went to a few gasser cams, and then I went all out and custom made some billets.
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#21
by
Rabbit on Roids
on 06 Apr, 2010 11:00
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Kevin,
I would be interested in what makes the pump not bolt on. I am assuming you mean the mounting? I have a Cummings 12mm pump that I retrofitet idi parts on that I was planning on putting on a very interesting engine setup for a 4 runner. Any info would be great... You see to me bolt up means something my welder, plasma cutter, and mill might have to touch . plus making a pump fit is easier to me than machining 4 pistons to +- .05cc.
truckinwagen, I have a few mild gas cams I started with that I might be willing to get rid of. If you also have a spare engine I would be able to work with you on getting a set of pistons sorted out and maybe a cam. PM me if you want more details. I started out with a pp idi cam in my tdi, then I went to a few gasser cams, and then I went all out and custom made some billets.
do a search on mTdi, so far, there is no such pump that anyone has found that is a bolt on and run pump. it will bolt on the engine and hook up to everything just fine, but it will run like complete crap. maybe not at all. people take IDI pumps, and TDI heads, with a few parts from each pump, sometimes people can get a running Mtdi pump. there are no timing specs for mtdi pumps, just rough areas that they run at. nothing set in stone tho. mtdi pumps are kinda in a grey area it seems like. no one really has any definitive ways on how to build a proper mechanical pump. owen used a cummins pump on his IDI just fine. i dont know why you couldnt use a cummins or volvo pump for the same purpose on a DI engine tho. 4 cylinder volvo marine engines use VE pumps with a 17mm shaft and an 11 or 12mm head in them. those engines will turn 3600 - 4000 in gear depending on what boat they were in. and that was with stock government. i never tore into one tho as to see what type of governor it had, but im assuming it was probably un caged since it was a marine engine, and vws are the only caged governor ive seen, but that dont mean much, i havent personally had to dive into any pump besides a VW pump.
and come to think of it owen, wasnt aki using custom pistons tho? i guess you are right about the pistons being tough enough to mangle valves.
and i really think you should come up with some sort of custom grind for our engines. most of us cant afford to mod a TDI, let alone afford to buy an engine. tdi's are like 1500 bucks minimum. most of us barely have 1500 bucks in our whole build, and that includes the cost of the car. lol.
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#22
by
truckinwagen
on 06 Apr, 2010 11:47
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from the pics Aki posted they were stock AAZ pistons and he turned the top off on a lathe so they were flat, then he machined valve pockets and a channel for combustion gasses.
I have something great happening to me, I have a new car with a motor, and I have a place to keep my old car/motor, so I will have a motor that I can experiment on, as I don;t have to worry about it as my DD.
the test motor has mechanical lifters though, nad my new car has hydraulic... so things may not translate over perfectly.
I have a late ABA cam that looks like a good fit, it has -7* valve overlap, modest duration, and much better lift than the diesel cam. it is a hydro cam, but I planned on shimming under the lifter buckets to make up for the difference in base circle from the mech/hydro diff.
that way I could install it, see if it clears the pistons(even clearance them if needed) and see how it runs.
then if all is well, I could toss it into my DD motor knowing what all needs to be done, etc...
for a mech lifter engine, the euro K-grind camshaft looks like a good fit, but I dont have one to confirm that(TT sells them for like $50 though)
I plan on having an adapter made up for the cam nose so a diesel sprocket can be installed on a gasser cam so I can try a few out.
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#23
by
truckinwagen
on 06 Apr, 2010 11:49
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oh, and the cummins pump I am using is built for a DI motor, so it should run a TDI just fine.
I already figured out the governor for more RPM, so other than that, I am not sure what would need to be done to it to run an M-TDI
I do have plans at some point to get my grubby little mitts on an ALH to find out.
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#24
by
Rabbit on Roids
on 06 Apr, 2010 12:35
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whats different about the gasser cam nose? i know what a diesel one looks like, just never had a gas cam gear off yet.
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#25
by
truckinwagen
on 06 Apr, 2010 12:37
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gasser cam nose is identical to an IM shaft nose
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#26
by
NintendoKD
on 07 Apr, 2010 17:50
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Cheap Fast Reliable
You can only pick two.
Horsepower costs money, how fast can you afford to go?
this was quoted fom many places, to include another forum I moonlight on,
www.spyderchat.com which is why I'm putting this engine in my 2400 lb spyder I am well versd in the quest for power, from an enthusiasts perspective, I am just looking for the thriftiest way "if there are two vendors that have wicked rods I want the best price between the two" his mostly applies to people offerying vendor advice for components. And, yes, to answer your question, I am quite ambitious, my choices would be fast and reliable...... ok, REALLY FAST, and semi-reliable, LOL!
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#27
by
NintendoKD
on 07 Apr, 2010 17:53
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there is an amount of money you can replace with time.
so if you can afford to do lots of the work yourself(spending time instead of money) you can have fast, reliable, and affordable
this is of course limited by your abilities to fabricate/machine/etc...
Totally back this up 
my work has been reliable so far. It's been what i haven't touched that hasn't been reliable. I had no money but heaps of time and i built a decent engine with slim to no cash but with many many hours of time.
asking these guys for help and figuring out the nitty gritty for most of it. Learning how to do things like install rings without breaking them, how to port a head & intake and so it goes on...
bam, hit the nail on the head, got it there. I am doin most of the work myself, just lack a lot of the resources to do so "machining, and I am in the middle of the desert you know
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#28
by
NintendoKD
on 07 Apr, 2010 19:17
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I am using mech lifters and a modded mech cam, just don't know who can grind it for me
and FYI it is an aaz head with an old, and I mean OLD Mech 1.6 turbo block without the oil return in the block. I plan to drill the steam holes and use an engine/mains girdle along with a dry sump pan.