edited as I'm constantly updating it.
After a load of mulling stuff over, I've finally come up with a design and rough spec for the V6.
It must meet the following criteria
1. max revs 7200, as I don't want to purchase a steel bottom end for it, and want it to last, hence the rev limit.
2. No TB's. Yet! I want to get it up and running cheaply, once I've got it reliable and am used to it, then I'll maybe start thinking TB's.
3. Minimal cost. Except for the ECU, which I've decided on.
4. Peak torque at around 4500rpm, and peak power at around 6500. This'll limit the maximum power I can get, but it's a sensible starting point.
Righto, this how I think I'm going to do it.
1. Bottom end.
This is standard, except for ARP big end bolts. These are purely for security, as the 3.0L's have a habit of spitting rods out!
new maincap bolts
retorque big end bolts
replace oil ring on #5
2. Oil system
Oil system is standard, as it won't be stressed outside of normal operating paramaters. I may baffle the sump though.
running in oil
new oil pump gasket?
The heads will be flowed, but not opened up excessively. For the moment, I'll stick to the 32mm inlet valve size, and 28mm exhaust. It'd be nice to go bigger, but the money's best spent elsewhere at the moment. Cams'll be around 275ish degrees, that should match the power/torque peaks. I want to retain std lifters (for the moment).
1 head started, 1 port set completed, other 2 inlets matched to flange.
finish started head.
1 head needs stripping and porting
need to find and clean: cam covers, cams, lifters and valvetrain.
should really purchase new cam belt and rollers.
rebuild the lot
bolt it to the block
do the timing
I'm going to build a twin plenum intake system, with tuned length runners. this should provice a modest boost to torque in 2 places on the curve. The Plenum design will be aimed to boost the 3500-5000rpm region, and the runners will be designed for 6000 rpm. This way there'll be a lower peak torque, but it'll be very progressive, and spread hopefully reasonably evenly across the rev range. The 2 plenums'll have XE throttles on them, and the Plenum intake'll be adjustable, to enable the plenum to be tuned. It'll run 12 injectors (cos I can), 1 close to the inlet valve, the other 8 cm behind it.
lengths and dimentions determined
Tube and plenums obtained
found an XE throttle
cut plenums to correct size
Welded tubes to flanges.
found 2 servicable XE throttles
make plenum inlets
make throttle Linkage
These are going to be tubular, and be 6 > 2 > 1 > 2, as suggested by my exhaust design book. it'll be tuned for about 5k.
2" stainless tubing bends obtained
rough primary lengths figured out
design lengths and sizes
Purchase raw materials
get flanges made
when engine fitted, build on car.
The std pump'll be blanked off and an EWP running at full tilt will replace it. the thermostat will remain. I've done a bit of research on this, and this way means that there'll be a lot less potential problems. Do a search on Blatchat for more information. Monza 3.0L radiator
monza rad on other car
Figure out plumbing
fit polo heater either where battery box is, or inside the car.
DTA P8PRO. After a lot of mulling/annoying people with questions, I'm going to save up the pennies and go the whole hog. Home made loom.
Loom coming along,
figure lambda wiring and purchase sensor
purchase TC sensors, and figure out mountings/triggers
Lightened XE flywheel, helix sprung paddle friction plate, helix heavy duty cover plate, std Getrag 240 initially, going to type9 with SC gearkit. std prop (till it breaks). Std Axle with zf plate diff.
Diff being rebuild into axle
Clutch on order
flywheel on other car.
bought spare box
take flywheel off other engine.
collect old box from the lakes
280mm willwood disks and 4 pot wilwood calipers on the front, citroen BX front calipers and BMW disks on the back. 22mm master cylinder, adjustable wilwood bias valve.
rear brakes tested and installed on other car.
wilwood valve installed on other car
Wilwood kit fitted to second car
bleed the buggers again
10. The car
Silver Manta Coupe, completely standard, running CIH lump. needs
Pass MOT: head lights
strip and seam weld,
move bulkhead back slightly
seal up underneath, clean and underseal.
400 boot spoiler
All the tuned lengths for the induction and exhaust components will be designed from various theoretical sources, so what they'll be in practice god only knows. But it'll provide a good starting point.
DTA P8PRO £1k
Clutch and coverplate £320
lambda sensor £90
TC sensors £40 each
manifold pipes, exhaust pipes and silencers £400
maincap bolts £10
crank bolt £10
sump gasket £5
oil pump gasket £10
running in oil £20
cam belt kit £85
axle rebuild £200
type9 box + bellhousing etc £1300