A couple of engine questions-need help

[donthekawguy]

OK the first one- the kid is almost done with his 90 b18a motor. It has no injectors and he needs to know what size he should get. It has stock cams, intake, throttle body and a ported head. He has plans for a new set of cams and a new intake and throttle body down the road. Should he just a set of stock injectors or maybe bump up a bit and thro on the mainfold and throttle bod in a few months? If so what size should he get?
Next- now that we have the cams in, the "up" marks on the cam sprockets don't line up. One looks to be off a tooth but the cams were put in using the holes in the cams with nails put in through the cam cap holes. The engine has been rotated and the cams are not hitting the pistons. When we got the motor it was apart so I don't know if the "up" marks were off a little from the start. I figure with the holes in the cams linedup right it should be ok. What do you experts think?

[KryptoSol]

Injector size will depend on your guy's HP goals. I would recommend just buying injectors once, get'em big! haha... 750-880cc should be more than enough for most. But remember you won't be able to idle them without some type of fuel mangement.

Line up the cam gears in the "up" position and make sure the crank pully is on the white mark (TDC).

I think thats it, What do the experts thing??

[donthekawguy]

Injector size will depend on your guy's HP goals. I would recommend just buying injectors once, get'em big! haha... 750-880cc should be more than enough for most. But remember you won't be able to idle them without some type of fuel mangement.

Line up the cam gears in the "up" position and make sure the crank pully is on the white mark (TDC).

I think thats it, What do the experts thing??


Well when I line up the marks so they are straight up, the holes in the top of the cams won't line up. I figured it is safer to have the machined holes line up rather than the stamped maks on the pulleys line up. I guess we will find out when we start it up. LOL

[donthekawguy]

One more question. I see a lot of injectors on ebay. They are advertised as fitting a bunch of makes and models of cars. What will fit on this b18?

[KryptoSol]

Hop on Honda-tech.com usually you can get decent deals from the vendors. Look at Precision, you can usually get them for 250-320 depending on the size.

Well, the cam gears have the arrows and little tick marks 90* on each side of the arrow. The tick marks line up with the top of the head, horizontally.

****** some thing like this
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[BlackMagic]

Honda engines are zero tolerance, if you don't follow the correct timing setup chances are you will hurt something when it is running (been there done that).

Take the timing belt off and follow the belt installation procedure again, this is a pain in the ass, but it is cheap insurance.

If I remember correctly the procedure is as follows:
1. Make sure the crank is at TDC on cylinder number 1 by lining the mark on the crank pulley with the mark on the block (I believe it is the white mark if you are using a factory pulley).
2. Setup the cams so that the machined marks are inline with each other and parallel with the angle of the cylinder head.
3. install the timing belt around the crank end first and then over the cams. Be sure not to move the cams or the crank. After this, double check that the crank pulley and cams are still in the correct position.
4. Loosen the auto tensioner pulley and allow it to put tension on the belt. Tighten the auto tensioner bolt.
5. **IMPORTANT!!!!** Rotate the engine (in proper direction) 1/4 crankshaft rotation.
6. loosen the tensioner bolt to take up slack and then re-tighten tensioner bolt and torque.
7. rotate the engine by hand 2 times and re-check that the crank and cam marks line up with the appropriate marks on the engine.

I am about 95% sure that this is almost exactly what the Honda manual says, but I did it from memory...so if in doubt check a service manual.

[BlackMagic]

For injectors, if you plan to stay naturally aspirated I dont see a need for anything higher than 550cc, get saturated (high impedence) injectors if you plan to use a factory Honda ECU. It will save you time in the long run.

[donthekawguy]

For injectors, if you plan to stay naturally aspirated I dont see a need for anything higher than 550cc, get saturated (high impedence) injectors if you plan to use a factory Honda ECU.**It will save you time in the long run.


Cool. Thanx. i'll have to take it apart and see what happens.

[GetawayInMoscow]

lmao 550 CC is HUGE for an NA car

If you are maxing 370's on an NA car you are making serious power. 550's are just crazy.

[BlackMagic]

lmao 550 CC is HUGE for an NA car

If you are maxing 370's on an NA car you are making serious power. 550's are just crazy.


550cc were at 82% duty cycle on the civic when it was NA...but I guess it was making aboout 265hp. So yeah...maybe a little smaller on the injectors...lol

[thursday]

what meng said about the cam sprockets

line the horizontal marks up parallel to the head, and the crank at TDC. Most honda engines have an offset mark on the crank sprocket and the oil pump, but this also corresponds to the woodruf key being at 12 o' clock.

a lot of times you'll get confused and it will look a little bit off...this is due to timing belt slack. Once I line my engines up i always turn them over a couple times to see how the marks look when it comes back up to TDC