3rd Generation Specs...

[Action Jackson]

Third Generation 2.0 Si 1988-1991

Model 2.0 Si - Engine B20a5
Engine
Type Aluminum-alloy in-line 4
Displacement (cc) 1958
Horsepower@rpm 135@6200
Torque (lb.ft. @ rpm) 127@4000
Compression Ratio 9.0:1
Valve Train DOHC, 16-Valve
Fuel Induction System Multi-Point Programmed Fuel Injection (PGM-FI)
Ignition System Electronic
Drive Train
Type Front-Wheel Drive
Manual Transmission 5-Speed
Electronically Controlled AT 4-Speed w/Sport-Shift
Final Drive Ratio (MT/AT) 4.27/4.13


Body/Suspension/Chassis
Body Type Unit Body
Suspension 4-Wheel Double Wishbone w/Coil Springs
Stabilizer Bar (mm, front/rear 25.4/17.0
Steering Type Variable-Assist Power Rack-and-Pinion
Steering Wheel Turns, Lock-to-Lock 2.81
Turning Diameter, Curb-to-Curb (ft.) 34.8
Brakes 4-Wheel Power-Assisted Disc
Wheels 14-inch Steel Wheels w/Full Covers
Tires 195/60 R14 85H

Exterior Dimensions
Wheelbase (in.) 101
Length (in.) 177.6
Width (in.) 67.3
Height (in.) 51
Track (in., front/rear) 58.3/57.9
Curb Weight (lbs., MT/AT) 2639/2674
Coefficient of Drag (Cd) 0.34

Interior Dimensions
Headroom (in., front/rear) 36.9/34.1
Legroom (in., front/rear) 43.1/27.1
Shoulder Room (in., front/rear) 53.1/51.1
Hiproom (in., front/rear) 51.5/45.1
Cargo Volume (cu. ft.) 11
Interior Volume (cu. ft.) 87

Capacities
Fuel (gal.) 15.9



Third Generation 2.1 Si Engine - B21a1
1990-1991

Engine
Type Aluminum-alloy in-line 4
Displacement (cc) 2056
Horsepower@rpm 140@5800
Torque (lb.ft. @ rpm) 135@5000
Compression Ratio 9.4:1
Valve Train DOHC, 16-Valve
Fuel Induction System Multi-Point Programmed Fuel Injection (PGM-FI)
Ignition System Electronic

Drive Train
Type Front-Wheel Drive
Manual Transmission 5-Speed
Electronically Controlled AT 4-Speed w/Sport-Shift
Final Drive Ratio (MT/AT) 4.27/4.36

Body/Suspension/Chassis
Body Type Unit Body
Suspension 4-Wheel Double Wishbone w/Coil Springs
Stabilizer Bar (mm, front/rear 25.4/17.0
Steering Type Variable-Assist Power Rack-and-Pinion
Steering Wheel Turns, Lock-to-Lock 2.81 (2.66) *
Turning Diameter, Curb-to-Curb (ft.) 34.8 (31.5) *
Brakes 4-Wheel Power-Assisted Disc
(Optional ABS)
Wheels 14-inch Alloy Wheels
Tires 195/60 R14 85H

Exterior Dimensions
Wheelbase (in.) 101
Length (in.) 177.6
Width (in.) 67.3
Height (in.) 51
Track (in., front/rear) 58.3/57.9
Curb Weight (lbs., MT/AT) 2690/2725
Coefficient of Drag (Cd) 0.34

Interior Dimensions
Headroom (in., front/rear) 36.9/34.1
Legroom (in., front/rear) 43.1/27.1
Shoulder Room (in., front/rear) 53.1/51.1
Hiproom (in., front/rear) 51.5/45.1
Cargo Volume (cu. ft.) 11
Interior Volume (cu. ft.) 87

Capacities
Fuel (gal.) 15.9

[tytyguy]

nice 'action'. thanks for the post

[Anthony]

nice 'action'. thanks for the postWhat he said. Nice to see others trying to help out. So far, this place is the pimp.

[GOLDJUMP]

Anyone tell me the recommended spark plug types / gaps for an '89 2.0 SI 4WS?
Came with BOSCH Platinum FR70PX GERMANY R3 391.

[THE ONE]

great facts Action! bump to help GoldJump out because I don't know either...

[GOLDJUMP]

Thanks, TopEndLube !!
Just bought it.
Come from Motorcycles (my prize possession is an '82 Honda CX500 TURBO) and my son is into CIVIC's & CRX's. I just SO understand Honda's !
So my '89 Prelude gives me the car I've wanted for so long AND a way "in" to talk with my son.
I'm really surprised my CHILTON's manual won't tell me what plugs I need and I'm actually embarrassed to ask on this forum.......

[THE ONE]

bump again to help him out. That is cool that your son is into civics and crx's. Just let him know that the lude is the big brother for the civics and crx's.

oh! talk to David(91hondalude) on here. He should know what they use.

[gearhead3g]

Anyone tell me the recommended spark plug types / gaps for an '89 2.0 SI 4WS?
Came with BOSCH Platinum FR70PX GERMANY R3 391.
see if you can find the helms manual. i think www.prelude3g.com has it on there in adobe. ill try to see if my manual has it tomorrow. good luck

[THE ONE]

see if you can find the helms manual. i think www.prelude3g.com has it on there in adobe. ill try to see if my manual has it tomorrow. good luck

thanks man:cool:

[89lude]

the dealerships here in louisville ky recommend NGK plugs

[GOLDJUMP]

They cleaned up nicely.
Gap is at .045 and the Chiltons manual says do not re-gap platinum plugs.

[GOLDJUMP]

This is not to say I'm dilemma-free.
Still don't know if they are the correct plugs.

Also, I'm looking to get a new cylinder head.
My son has an ECU from a B16 VTEC that he says ought to be compatible if I'm able to get a used VTEC head.
I'm mainly looking at getting a used '89 stock head just to keep everything simple.
Which way would you all go, what year(s) head would be a good swap, and what kind of $$$ am I looking at ?
The previous owner toasted his timing belt and I can hear there are bent valves/stems. Maybe cheaper to get the valves re-worked ?

Just dying to get this 4WS sweetheart on the road !!

[THE ONE]

I think its cheaper to get the head redone. Also... The b series engines in the civics and integras are different from the ones in the preludes so they don't fit. The ecu won't work in your case. So I would just get the head I have fixed. It works out cheaper in the long run.

[gearhead3g]

well i cant seem to find my manual so when i can ill reply again

[GOLDJUMP]

My son also had the specs for NGK.
Appreciate the reply.
Hoping to get info on the platinum's since they are what I have AND performance oriented.

[89lude]

i have a b20a5 i had to replace 8 of the valves\stems it costed me $300.00

[Prelude13]

This is not to say I'm dilemma-free.
Still don't know if they are the correct plugs.

Also, I'm looking to get a new cylinder head.
My son has an ECU from a B16 VTEC that he says ought to be compatible if I'm able to get a used VTEC head.
I'm mainly looking at getting a used '89 stock head just to keep everything simple.
Which way would you all go, what year(s) head would be a good swap, and what kind of $$$ am I looking at ?
The previous owner toasted his timing belt and I can hear there are bent valves/stems. Maybe cheaper to get the valves re-worked ?

Just dying to get this 4WS sweetheart on the road !!


A vtec head was done actually by Tom Coleman. He did a b16 head swap onto a b20a block.
He mad many issues, and the main issue was oiling. Remember our motors have the gangsta lean...leans back 15degrees so the low hood line can work, Honda dubbed this, "Engineless design." Vtec drivers know, oiling is a big factor for the engagement.

You cannot swap in a b16/b18...why? why downgrade yourself with a motor that has no tq compared to a natural 2liter like the b20a? putting in a b16 into a 3g Lude will change the cars personality drastically. Imagine hitting the corners in the Prelude and all of a sudden your exit speed is reduced b/c you are stuck revving sky high to move the car.

Remember* Tq is what gets you moving, Hp is how much work can be done, faster. Personally, if you can find a low mileage b21a1, get that. People will yell and moan about the oil burning issues.

Your only realistic swap is the JDM b20a. A direct swap, reuse all manifolds, sensors and ECU whether you have the pk2 or pk3 it'll work fine. Forget the p75 or whatever nonsense Integra ECU. If you're obd1, get a PK3. And best of luck finding a JDM b20a.

:D

[GOLDJUMP]

Thanks for the excellent info !!
Gonna pull the head for now and see what I got.
Have some good "Old-School" NASCAR type buddies that will help take a look.
Bringing my metric tools to pull everything myself.

May be posting for valve seat / stem specs in the near future.
I know they can turn and lap every and anything, just want to be able to give them the numbers.

[team123luder]

platinums are a waste.


stick with NGK or denso.

[Prelude13]

Just to let you know, they have a complete rebuild kit for the b20a5 motor.

Here is a few links i found:
http://www.hi-performance.com/ImportRebuildKits.htm#Honda4Cylinder


http://www.rpmrons.com/Hondakits.html

I also remember Jasper engines used to make a fine kit for the b21a1, removing the FRM sleeves...too bad they dont make that kit anymore:mad: so im sure if you can call them and talk to them, they should have a kit for the b20a5.


best of luck, keep us posted and bring your 4ws baby back to life!!

[GOLDJUMP]

platinums are a waste.


stick with NGK or denso.

Could you be more vague ?;)
The plugs in there now are platinum and they gap good / clean. But I don't want to spend more than I need to when they "**** the bed" so I will be looking at NGK's then.

Do you know that spark plugs actually shunt heat from the cylinder ?

[team123luder]

Reason why I said platinums are a waste is because they last a long ass time.... but between now and when they are no good..... well they'd be filled with carbon.

Plus they wont add performance unless you're really really built.

[Blue90Si24]

i always use ngk iridiums and ngk blue wires