lukenordman

Ok guys heres my b20b p8r all motor build thread.

Im swapping this into my ed6 hatch. Just ordered the motor and have most of my parts.

I was going to go b20v but i like p8r as well.

Comparing the two builds power wise.

B20v
Ferra valves
Ferra springs/retainers
Crower stage 1 b16 cams
Peak hp 8500 rpm
9000 rpm redline
12:1 85mm pistons
Arp fasteners
Sleeved block
Estimated hp 209.3whp

The p8r built the same makes only 10 less hp which is why i decided to go that route. Evetually a 95mm crank will be in the car with same head and compression my calculator estimates 216.5 whp. Which i feel is a lot for a na b20 p8r...if my calculations are wrong please tell me. And if wprse comes to worse i can just sell the p8r head and keep the block fpr a pr3 head

Runnerdown

Hmmm.

P8R head with vtec cams?...how?
Sleeved block? ...why?
arp fastenrs for what?
what intake manifold, header and exhaust?
HP estimates came from..?
Tuning with..?

Also calling out redlines and what not sounds amateur and ricer. Do more research I don't think your build is going in the right direction.

lukenordman

Sorry i knew i left out some stuff after posting...
Skunk2 megapower header some have said this is enough others say to look at ssr sidesweeper.
Edelbrock performer x intake
2.5" exhaust
Crower stage 3 cams
Was told it should be sleeved because it has a weak bottom end.
Arp head studs are rob bolts unless stock rods with stronger bolts wont help.
And a chipped p75 from portland speed industries.

91SIR

I think he was saying what cams he had for the b20vtec. If he went that route.

OP just run arp rod bolts. head studs aren't needed unless u just want a little extra.
Crower stage 3s are you talking about 404s or Brian crowers andAre you caulculating hp at the wheels or crank?

What are your plans for the car(DD, drag, ect) 9k Rpms is a lot. Dyno it and see where it makes power to. No need to rev that high if it's not making power past 8000

lukenordman

Ill post link for the calculator and cams theyre stage 3 made by crower b18 a/b but have same power band as a stage 1 b16 by them basically.
The calculator is a very basic one but i felt itd give me a basic feeling for hp. Its based off peak hp rpm head build and displcement

http://www.crower.com/camshafts/honda-acura/acura-1-8-rs-ls-dohc-camshaft-price-per-pair-6396.html
http://www.zealautowerks.com/horsepower.html

P.S. the b20v is my backup option. As to what im doing with the car im not really sure i paid 500 bucks for it to have sokething to work on.

lukenordman

Also seem to be having a hard time finding b20 non vtec pistions...am i sol?

m4xwellmurd3r

Vtec heads are usually one point higher vs ls heads. For instance, my 10.7:1 pistons would be somewhere in the mid 11s with a vtec head. Easiest thing I assume is to compare dome sizes between pistons. 3.4cc domes are what mine have

lukenordman

So can i use a b20 piston fpr a pr3 head on a b20 with a p8r head? Thats what i got from what you were saying i know the p8r has 33mm valves instead of 31mm and it has 9.2:1 compression. I guess what you said ment to me a b20v piston that makes 12.5 cr should be 11.5 in my car?

m4xwellmurd3r

Check out the b series compression calculator. Just punch in what parts you have and itll gove a rough approximation on what your compression will be

Basically yes. I dont know the cc of the p8r head but I think ls heads are 44cc. More cc in the head means less compression.

Check your piston to valve clearances to

Also p8r heads have bigger valves than the ls. I think theyre the same as the vtec heads so be sure to check the valve reliefs for proper clearance

lukenordman

On the calculator i used a 84mm b20 piston intended for a b16 head that was 12.5:1 it calculated id have a 11.8:1compression probanly the closest ill get to 12:1 compression without stroking it a 85mm 9.0:1 piston and 95mm crank estimated 12.1:1. And the p8r has 47cc combustion chambers

m4xwellmurd3r

11.8 isnt bad. Maybe get a slightly thinner head gasket if you want to get into the 12:1 range. Definitely check all the p2v clearances

lukenordman

How do i find out what my p2v clearance should be with the p8r head? Thanks and what valves do i use since there 33mm

And what the heck do i do about the valves it just registered in my head....they have 33mm valves i dont think theres a aftermarket base for this head?

lukenordman

So after becomng discouraged and planning on a b20v swap i decided why not see if i can find someone who makes custom sized valves...search first thing that comes up is a custom order sheet for ferrea valves! Hope for a built p8r has been restored.

Who sould i talk to for the specs though? Do i just put stock p8r valve specs ect?

Link

http://www.ferrea.com/custom_valves.php

blackeg

use the zeal calculator its the most accurate

http://www.zealautowerks.com/bseries.html

the rs machines (and probably ycp itr replicas) are a great piston for a non vtec motor.

lukenordman

Thank you

EsotericImage

iTrader: (8)

I have this build and am using YCP ITR replica's with the P8R.

The OEM valves are fine, just get a 3 angle at least. 5 angle on the intake if you want to go extreme.

Moving on to the ports. I used sanding barrels on my cordless drill and slowly blended the ports and removed casting marks.

You can deck the head a little to bump it up. The pistons are a 1.3cc dome and i think a little smaller on the 84.5mm.

I used ARP rod bolts only cuz of cheap insurance and resized for new ACL bearings. Im using the stock .0015 clearance.

Im using old skool Crane 0016's and love em. Mine idles quite well for 108 LSA.

So some of the other **** you posted is fine. Im using the PLM Toda replica header and 3" exhaust. Use some of that sleeving cash for new injectors, vented catch can set up, tuning software, and all the other **** your going to want.

Mine dyno'd at 166/142 and then theres other members who have major port work well into the 200whp mark.

Heres my dyno sheet and a link to help yu get on point with your build.

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/building-your-dream-car-101-a-3102979/


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lukenordman

Thank you! Feel like a lot of my questions have been answered.

EsotericImage

iTrader: (8)

oh yea, my compression is in the neighborhood of 11.2-11.4;1 with these pistons.

lukenordman

Alright thank you. These are ebay piston? Only place i see them for sale

lukenordman

Also since ill be running 11.5:1-12:1 compression at im guessing 7500-8000 rpms should i be worried about my stock sleeves. The stuff ive kept reading on others posts that no matter what thatll crack.

EsotericImage

iTrader: (8)

IDK where you read that.

as long as you dont detonate, they will hold up fine.

lukenordman

I think swap forums and club integra. Not 100% but it was honda forums that came up on google when i was searching. They basically said it was a bad engine and sounded uneducated so i figured id ask. Thanks