D16 rebuild tips read this before u laugh
Thread Starter
Joined: Apr 2006
Posts: 1
Likes: 0
From: summerside, PE, Canada
D16 rebuild tips read this before u laugh
Hey I have a 1991 honda civic si. i am plannin on retireing my d15 in which i race in a 4 cylinder oval track class. the cars r saposed to be "stock" but what they cant tech dont hurt them. i am goin to rebuild the engine before i put it in. what are some cheap things i can do to add power that they wont be able to see too bad. everything helps...thanks for ur time.
Honda-Tech Member
Joined: Jan 2003
Posts: 2,841
Likes: 1
From: the backwoods, usa
Re: D16 rebuild tips read this before u laugh (LSVT3K 91 C1V1C)
try some different oils. here is a test todd did.
https://honda-tech.com/zerothread?id=1414625
index your plugs with the strap inline with the TBelt/tranny.
i found 1-2% by doing this. it all adds up.
i've read other people prefering to index towards the exhaust side as well. so try it and see what works for you
i've read about cutting every other fin off the water pump. i've never tried it, nor do i know if it would cause cooling problems in your racing application.
when you install the valve seals remove the little springs on the seal. reduce friction.
some engine builders run specific bearing clearances trying to pick up some extra power.
do a pan-evac into your exhaust and pull crankcase pressure out of the engine.
maybe a phenolic spacer between your IM and head if you can get away with it.
obviously some gains in the head. at the valve seat. a camshaft if you can get away with it.
transmission fluid. wheel bearings. alignment. are some other places too look for advantages.
lighten anything in the rotating assembly possible. i think HF 1.5L had lighter crankshafts than the rest of the D's. here's some info. doesnt really matter if you want to run a 1.6 i guess.
mista bone posted this info over on D-series.org
"Interesting notes...........and random pondering...........
Crank Pulley Weights
Z6 = 8 lb, 2 oz
D15 non A/C = 3 lb, 9 oz
4 lb, 9 oz difference
Whatever scale I used before was JUNK! Bigger difference that I thought (6.5 vs 2.75) I'd scaled before.
Crankshaft Weights
HF = 21 lb
D15B7 = 24 lb
D16Z6 = 30 lb
Piston&Rod Weights, no rings or bearings
HF = 675 grams
VX = 710 grams
DX = 715 grams (88-95)
Y8 = 730 grams
Z6 = 750 grams
VX rod/P29 piston = 755 grams
Combo weight of crank + pulley
D15B7 = 27 lb, 9 oz
D16Z6 = 38 lb, 2 oz"
do any aero mods you can. tapping things on the front end. cutting diffusers into the rear bumper, or gettting rid of most of it to reduce drag.
that should get you started. good luck
https://honda-tech.com/zerothread?id=1414625
index your plugs with the strap inline with the TBelt/tranny.
i found 1-2% by doing this. it all adds up.
i've read other people prefering to index towards the exhaust side as well. so try it and see what works for you
i've read about cutting every other fin off the water pump. i've never tried it, nor do i know if it would cause cooling problems in your racing application.
when you install the valve seals remove the little springs on the seal. reduce friction.
some engine builders run specific bearing clearances trying to pick up some extra power.
do a pan-evac into your exhaust and pull crankcase pressure out of the engine.
maybe a phenolic spacer between your IM and head if you can get away with it.
obviously some gains in the head. at the valve seat. a camshaft if you can get away with it.
transmission fluid. wheel bearings. alignment. are some other places too look for advantages.
lighten anything in the rotating assembly possible. i think HF 1.5L had lighter crankshafts than the rest of the D's. here's some info. doesnt really matter if you want to run a 1.6 i guess.
mista bone posted this info over on D-series.org
"Interesting notes...........and random pondering...........
Crank Pulley Weights
Z6 = 8 lb, 2 oz
D15 non A/C = 3 lb, 9 oz
4 lb, 9 oz difference
Whatever scale I used before was JUNK! Bigger difference that I thought (6.5 vs 2.75) I'd scaled before.
Crankshaft Weights
HF = 21 lb
D15B7 = 24 lb
D16Z6 = 30 lb
Piston&Rod Weights, no rings or bearings
HF = 675 grams
VX = 710 grams
DX = 715 grams (88-95)
Y8 = 730 grams
Z6 = 750 grams
VX rod/P29 piston = 755 grams
Combo weight of crank + pulley
D15B7 = 27 lb, 9 oz
D16Z6 = 38 lb, 2 oz"
do any aero mods you can. tapping things on the front end. cutting diffusers into the rear bumper, or gettting rid of most of it to reduce drag.
that should get you started. good luck
Thread
Thread Starter
Forum
Replies
Last Post
brekekex
Forced Induction
23
Dec 12, 2010 08:23 AM
JG Luder
Honda Prelude
41
Jan 19, 2008 07:44 PM
BMo Tuning
Road Racing / Autocross & Time Attack
24
Sep 13, 2007 03:12 PM
