B23-Vtec

Yea you said they are the same just one has less teeth. And that the belt won't tension right because of it. You are wrong in what you said they are not the same at all.

B20VtecVillain

I guess technically it would be "VTEC all the time", because it's always on the high cam, but ive always considered it a VTEC delete because to me the key principle in a VTEC system is the switching from one profile to another, which this setup I'm speaking of no longer does. I know some people do, but I never really call the high cam VTEC, I generally think of VTEC as the actual system that switches from the low cam to high cam, not the high cam lobe itself.

wantboost

iTrader: (2)

Ok let me rephrase. Smart people understand that for the number of teeth to change the diameter has to change.

The area difference of the impeller is negligible.

Want to eliminate cavitation and other problems? Run an electric pump like me.

B20VtecVillain

The difference in flow between the two water pumps is nearly 30%, about 13% of that is due to the difference in impeller surface area. Not something I would really call negligible. Meizre electrics are great for a race setup, but totally unnecessary for a street car so it is good for the average enthusiast to know the difference between the pumps.

B20VtecVillain

Also, another reason for the T belt differences between LS and VTEC engines besides water pump gears is because the cams actually sit higher in a VTEC head than a non VTEC head and therefore the belt must also be a bit larger for VTEC applications.

wantboost

iTrader: (2)

It's still a stock water pump. It was designed to operate under very specific operations.

The meziere pump is great for a drag car because it runs wide open. I was referring to the Davies Craig EWPs that use a PWM controller to modulate pump speed. They only move as much water as is needed. They've been working well on time attack cars. I don't drag race, I road race so much of what I do doesn't translate to the rest of the honda community lol.

B23-Vtec

Electric water pump he say huh well look at that.

Turbo Bseries

I don't run upper timg belt cover because I have a K tune tensioner that goes on that side of my belt.. I have had it off for over 2 years and never had issues with stuff going inside my belt.. I think if will happen if car gets driven on roads with lots of rocks or off road, but on regular street roads I don't see it likely for that to happen..

TheShodan

iTrader: (14)

One can only hope for the best and expect the worst

m4xwellmurd3r

The gear position is negligable. I have a vtec velt and water pump in my ls and have more than enough room on the tensioner in terms of adjustment.

wantboost

iTrader: (2)

^ I like that setup. Any more photos? The Meziere pump works great for drag cars because they spend such little time at idle or under light load. People I've known who who run them on street cars commonly have issues with the car running too cold, especially at idle or part throttle cruise.

The nice thing about the Davies Craig pumps is they aren't really designed to run a constant speed. They can but it shortens pump life. They give you a PWM controller where you can control pump speed so you don't have issues with coolant temps bottoming out on street cars or time attack circuit cars. The controller also gives you a dedicated output based on coolant temp to run a fan, thermal protection methods, and so on. Some standalones also give you the ability to control water pump speed with a PWM circuit based on load/coolant temp/rpm, etc.

And yes the cam height between the two heads is fairly negligible. It's only a couple of MM I think. I'll measure my heads tonight.

B23-Vtec

There is a bunch of photos in my post on here in the all motor thread

rel

ok still collecting parts for my build, scored a set of rc1200s for the low i was told they were an exception to the adding a resistor box rule is this true or go with what i know lol

Geis

They still need a resistor box

rel

figured i was right, sad part i never planned on going that big of a injector but i couldnt beat that price

Geis

Yeah that's why I stayed away from rc, didn't feel like having to wire a resistor box.
Yep I got a steal on some 1000s myself, people would be surprised to see what steals are out there if you look and are patient

FeelTheBass

iTrader: (1)

RC makes high resistance injectors that do not require a resistor box.

I'm pretty sure you can use a multimeter to figure out if your injectors are low or high.

turbohatch96y7

iTrader: (15)

Yup multimeter across the terminals

Usually around 4 ohms for low resistance

wantboost

iTrader: (2)

I've been curious about the high end billet injectors that are available, considerably cheaper than a set of IDs and are compatible with every type of fuel.

NotARaCist

iTrader: (1)

Don't even need to wire a box, there's a guy who makes a plug and play setup. It's what I'm using.

Turbo Bseries

I sold the gsr head i had for my ls vtec conversion and just going with the aftermarket cams and springs and retainers.. and a retune..

I met a guy close to me with a set up very similar to mine also using the same turbo and he was pushing 15psi for close to 1 year.. then decided he wanted more power so got retune for 20psi and his car made 355whp, but only lasted him 1 day before the sleeve on cylinder #4 crack big time.. i will be buying the crower springs and retainers from him for 200 they are basically new only use 1 day..

I won't be scare to push mine, but i will probably do 17psi and with the cams i should see a good power gain.. also getting my slicks friday.. denso 13inch rim with 23inch slicks..

NotARaCist

iTrader: (1)

Cracking sleeve with only 355? Sounds like a tuner problem, not a hardware problem.

Turbo Bseries

That is what i told this guy, the shop that did the tune told him that since the engine is old the metal is old and weak and they don't last because of age.. i told him that they are going to give him every excuse they can think of other then the tune.. his engine set up was stock head with stock cams and crower springs and retainers and injectors, wiseco pistons, eagle rods, arp head studs, garret 60trim turbo, hondata s300.. the shop did told him he needed the crower springs and retainers to push 20psi, i told him not really needed unless he was going to go past the 7200rpm wich he did not..

Stopsign32v

iTrader: (1)

What injectors are you talking about?

0c00l

Do you have a rough idea what HP range you would start to see cavitation?
250
300
400?