Franensiten Motors B series

[b18cR]

hey just wondering what the deal with frankinstien motors are i know all the b series motor parts are compatable
got a type r teggy
its done 200KMS
is it worth getting a new b20 block and putting my head an manifold etc on it?
i dont think you can run the type r cams tho ? whats the deal with that?

b20 type r turbo would be quick as

[WingIt]

As I understand you cant run Type R cams as they have too much lift and would cause valve-piston interferance.

Also you need to drill the block for an oil line for the added VTEC, I also then the head or head gasket needs to be modded so it all bolts up.

Be better off buying Adams (EVLTEK) B20 motor in the parts exhange

[BRET]

you dont need to drill anything, put a T fitting where your oil pressure switch is and run an oil line up to the head, on a B series engine there is a bung on the back of the head that you can remove and get a fitting to screw into the head where the bung used to go. use a B20b head gasket (no hole for vtec oil gallery).

and i run 98spec ITR cams in mine with no problems

[FLYRYD]

from what ive read and heard,
if your planning to boost it, then i think a B20 engine wont be as good.
because of the design of the block, the sleeves break easier on them.

and if you planning to go NA with it, you need to change the pistons to aftermarket ones that will give more compression.
putting a ITR head on a B20 is going to be a low compression motor.

factory piston to valve clearance on a B20 vtec engine is very close, thats why you have to be careful of what cams to use.

[VTAKYO]

Yes, you can run Type R cams. It is also advised you run the Type R crank in the B20, or at least balance your entire B20 crank and internals. I would also advise in using a blockbrace.

Have a chat to Graham at 0800 CARTUNE, just off Montreal Street in the wee street next to Honda Cars - he has built many a reliable B20VTECs which go hard, and last a long time.

[FLYRYD]

Originally Posted by VTAKYO

Yes, you can run Type R cams. It is also advised you run the Type R crank in the B20, or at least balance your entire B20 crank and internals. I would also advise in using a blockbrace.

Have a chat to Graham at 0800 CARTUNE, just off Montreal Street in the wee street next to Honda Cars - he has built many a reliable B20VTECs which go hard, and last a long time.

if you use the ITR crank, it would be 1.9L not 2.0 L.... would it?

[VTAKYO]

Not sure, but it is just something I know a few people have done, and I was advised to when looking at building one.

[VTECKN]

Hi, sorry to bring this up again, i have a b20b motor, running standard b18c cams, heaps of people are saying that you can't put b18cr cams in because of the valve clearance etc, and then some people are saying you can, if someone can post the correct information that would be good!!!! Thanks Matt

[VTAKYO]

Evil_Elmo runs B16B cams in his, and the B20B EF9 that aznmech has for sale has all B18CR head parts. So yea, it is fine.

[VTECKN]

hey, ok thanks for the info. Cheers

[VTECKN]

Also, i am guessing it would be a good idea to run, cam gears aswell, just for that bit of fine tuning???

[tjones]

i run a boosted b20 with a type r head without the cams as i was worried about clearance but im now 100% sure if the head isnt shaved and the block isnt decked and stock pistons in the b20 will clear the itr cams

im getting blox turbo cams and appently they will work fine as well

[Green Machine]

Originally Posted by VTECKN

Also, i am guessing it would be a good idea to run, cam gears aswell, just for that bit of fine tuning???

Id say your be crazy not to run cam gears on a b20 with itr cams. It would be so close from what I have read.

@tgjones. Arent you selling your turbo b20 crx?

[itsjdm]

i herd u can

[crxmad]

Yip you definately can but theres not alot of piston to valve clearance left so go easy on the adjustment of cam gears.

Some engine builders will cut out the pistons valve reliefs to increase clearances further.
It would be more advisable to upgrade the factory pistons to high dome forged as you wont get much more than 10.5:1 CR with standard pistons.

[Coupe-R]

as you wont get much more than 10.5:1 CR with standard pistons

SHIT how do you get that much compression out of stock B20 bottom end?

deck block and shave head, then maybe not possible with R cams because of clearance?

I woulda thought easy in the 9.2:1-9.5:1 area of compression max on stock bottom end

[tjones]

Originally Posted by Green Machine

Id say your be crazy not to run cam gears on a b20 with itr cams. It would be so close from what I have read.

@tgjones. Arent you selling your turbo b20 crx?

yea no one wants to buy it so ill just keep modifying it till i die i spose lol i tryed to take a rich kid out and he couldnt controll the torque steer and didnt want it been for sale for 6 months only one person has looked at it

Yea bout 9.5 is off stock parts aye havent heard of anyone getting more

[GIVIT8]

Ive been running a B20 frankenstein for 5 years now, quite a few kms on it now. Not a daily driver anymore but when it is used it gets a thrashing. well worth the conversion ive had no issues with reliability, tuning, running adj cam gears. fuel economy is great too cos you dont have your foot up its ass to maintain or gain speed.

[BWDOWN]

Originally Posted by Coupe-R

SHIT how do you get that much compression out of stock B20 bottom end?

deck block and shave head, then maybe not possible with R cams because of clearance?

I woulda thought easy in the 9.2:1-9.5:1 area of compression max on stock bottom end

Meh I'm gunna push towards 11:1 on stockish bottom end and run it on pump fuel

Its how its built and tuned that counts

[Coupe-R]

No my point was trying to get that much compression using stock bottom end (so that means pistons too)
would mean you wouldn't have any room left for the valves and cam lift.

If you want to change compression on stock B20 most people change pistons.
You wanna plane head and deck block keeping stock pistons and get 11:1=FAIL

I'm sure I just misunderstood you, but I assume you are using aftermarket pistons to get your 10-11:1 compression?

Also 11:1 isn't high on pump gas at all

[BWDOWN]

Originally Posted by Coupe-R

No my point was trying to get that much compression using stock bottom end (so that means pistons too)
would mean you wouldn't have any room left for the valves and cam lift.

If you want to change compression on stock B20 most people change pistons.
You wanna plane head and deck block keeping stock pistons and get 11:1=FAIL

I'm sure I just misunderstood you, but I assume you are using aftermarket pistons to get your 10-11:1 compression?

Also 11:1 isn't high on pump gas at all

ahh yes of course aftermarket pistons...

This is gunna be one hell of a beast when finished

[Coupe-R]

(y)

[bOOd]

I am getting a b20b ef9 on sunday, test drove it the other week was very intresting good tourque, it is currently pretty standard but am thinking of getting a rebuild down the track so should be good. Does anyone know of a site dedicated to these builds?? Am after reliability more than anything with a few bolt ons, and what kinda power do these hybrids put out??

[berman]

Originally Posted by Green Machine

Id say your be crazy not to run cam gears on a b20 with itr cams. It would be so close from what I have read.

I always thought it was pretty common knowledge that camgears on ITR cams (on an ITR block) was considered a waste of money unless you had decked or milled the bottom end or head.
Same goes with a stock ITR head on a stock b20 bottom end from my experience, both gears are on 0 degrees, playing with them made no difference.

Originally Posted by Coupe-R

I woulda thought easy in the 9.2:1-9.5:1 area of compression max on stock bottom end

Stock b20b is 9.6:1, then you throw a vtec head on.

[Genkei]

Originally Posted by berman

I always thought it was pretty common knowledge that camgears on ITR cams (on an ITR block) was considered a waste of money unless you had decked or milled the bottom end or head.
Same goes with a stock ITR head on a stock b20 bottom end from my experience, both gears are on 0 degrees, playing with them made no difference.

You can move the torque and power range around
Most of the time u dont get much peak power out of bit but depends wat u got in there . . . but also it needs to be tuned with it

Seen a B20 witb P72 Head B18c cam
it gain 10hp in the mid range and 5 up the top