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Forum: Engine Repair, Diagnostics & Rebuilding   Yesterday, 12:24 PM
Replies: 16
Views: 343
Posted By alfaparticle
Details are here: ...

Details are here:
https://www.alfabb.com/bb/forums/spider-105-115-series-1966-1994/676728-79-spider-dyno-sequel.html

10.7 to 1; 93 octane pump gas. I have a little margin against detonation as it...
Forum: Engine Repair, Diagnostics & Rebuilding   Yesterday, 10:04 AM
Replies: 16
Views: 343
Posted By alfaparticle
This Nord information relates to your prospective...

This Nord information relates to your prospective TS build.
Jim Steck recently dyno'd a race motor with cams from Paul Spruell. He then swapped out the exhaust cam for an RJ785 from Richard Jemison...
Forum: Spider - 105 & 115 Series (1966-1994)   Yesterday, 09:57 AM
Replies: 20
Views: 250
Posted By alfaparticle
If you buy a coil and wire in the Marelli ballast...

If you buy a coil and wire in the Marelli ballast resistor then the coil primary resistance should be about 1.5 ohms.
Forum: Milano/75 (1985-1993)   07-16-2019, 06:14 PM
Replies: 7
Views: 111
Posted By alfaparticle
Bad grounds can cause a few problems but they...

Bad grounds can cause a few problems but they will not cause the injectors to stay on. If you suspect that the cold start injector is sticking on then clamp the hose after the car has briefly...
Forum: Spider - 105 & 115 Series (1966-1994)   07-16-2019, 09:41 AM
Replies: 2
Views: 108
Posted By alfaparticle
Renaissance man posted a similar question a few...

Renaissance man posted a similar question a few months ago. You should ask him how it worked out.
Forum: Engine Repair, Diagnostics & Rebuilding   07-16-2019, 05:50 AM
Replies: 16
Views: 343
Posted By alfaparticle
My 8V Nord makes 190 HP on pump gas with good...

My 8V Nord makes 190 HP on pump gas with good driveability and I am confident that it would make 200 HP at about 6800 rpm with 38 mm Venturis. PM me if you want to talk about it.
Forum: Alfa Romeo Cars For Sale & Wanted   07-15-2019, 12:41 PM
Replies: 35
Views: 4,377
Posted By alfaparticle
Underhood photos

Underhood photos
Forum: Engine Management   07-14-2019, 07:48 PM
Replies: 507
Views: 102,895
Posted By alfaparticle
I have done a lot of tuning and testing in the...

I have done a lot of tuning and testing in the way that Mike has outlined. Here are my suggestions:
Do a series of at least 5 runs in a short space of time with no changes and look at the variance...
Forum: Engine Management   07-14-2019, 02:25 PM
Replies: 507
Views: 102,895
Posted By alfaparticle
It is because he wants a clean signal to input to...

It is because he wants a clean signal to input to his Zeitronix ZT2 so that he can data log AFR and RPM. There are many posts on that subject. It is as good as dyno testing for Weber or programmable...
Forum: Alfa Romeo Parts For Sale & Wanted   07-13-2019, 02:25 PM
Replies: 5
Views: 151
Posted By alfaparticle
I have a smaller, lighter, gear reduction type...

I have a smaller, lighter, gear reduction type from a late S3 that is a straight swap and it does not need a support bracket. It works but it needs a rebuild. You can have it for the cost of shipping...
Forum: Off-Topic Talk   07-13-2019, 01:54 PM
Replies: 83
Views: 10,180
Posted By alfaparticle
Never owned a Saab but worked on my Brother in...

Never owned a Saab but worked on my Brother in Law's '92 900 convertible today. It is a nice car with terrible brakes. The TEVES ABS system is very similar to the one that was on my Milano Verde that...
Forum: Alfa Romeo Cars For Sale & Wanted   07-13-2019, 06:14 AM
Replies: 35
Views: 4,377
Posted By alfaparticle
I will be home from vacation on Tuesday and I...

I will be home from vacation on Tuesday and I will post pictures then.

Here is a post showing the air intake...
Forum: Alfa Romeo Parts For Sale & Wanted   07-12-2019, 02:27 PM
Replies: 10
  For Sale: Cool header on ebay
Views: 473
Posted By alfaparticle
I doubt that anyone has bothered to test a...

I doubt that anyone has bothered to test a factory exhaust on a competitive motor. Show me a competitive race car with a factory exhaust.
The very short primaries of the factory two piece manifold...
Forum: Engine Management   07-12-2019, 01:19 PM
Replies: 19
Views: 434
Posted By alfaparticle
Pinging is detonation if it can be eliminated by...

Pinging is detonation if it can be eliminated by less spark advance or higher octane gas. Mild detonation is not always destructive but severe detonation can damage things quickly.
Forum: Alfa Romeo Parts For Sale & Wanted   07-12-2019, 01:06 PM
Replies: 10
  For Sale: Cool header on ebay
Views: 473
Posted By alfaparticle
When Hayes Flyn's 2L race motor made 230 HP on...

When Hayes Flyn's 2L race motor made 230 HP on Jim Steck's dyno it was using modified IAP headers which are similar to GTA headers.
Forum: Engine Management   07-12-2019, 07:20 AM
Replies: 19
Views: 434
Posted By alfaparticle
Your centrifugal curve is quite steep at idle rpm...

Your centrifugal curve is quite steep at idle rpm and you may find that it does not want to settle at 1000 rpm and instead slowly speed up.
Forum: Engine Management   07-11-2019, 03:25 PM
Replies: 19
Views: 434
Posted By alfaparticle
Most motors will have a band of max ignition...

Most motors will have a band of max ignition advance that will make maximum HP and the width of the band varies with a number of parameters. One of them is fuel octane. There will be a lower point...
Forum: Engine Management   07-10-2019, 05:42 AM
Replies: 507
Views: 102,895
Posted By alfaparticle
My filters have had limited success. I have one...

My filters have had limited success. I have one that cleans up the coil -ve signal and another that uses a clamp on pickup from a plug wire but neither are very effective. I was able to get a signal...
Forum: Engine Management   07-09-2019, 08:23 PM
Replies: 19
Views: 434
Posted By alfaparticle
It does not make much difference. My motor starts...

It does not make much difference. My motor starts fine with 13 degrees static and stays at 13 before it ramps up to 34 degrees at 4000. You can get an unstable idle if the curve starts ramping below...
Forum: Engine Management   07-09-2019, 05:53 PM
Replies: 3
Views: 131
Posted By alfaparticle
NGK BP7ES should work fine.

NGK BP7ES should work fine.
Forum: Engine Management   07-09-2019, 05:50 PM
Replies: 19
Views: 434
Posted By alfaparticle
I would try getting all of the advance in by 4000...

I would try getting all of the advance in by 4000 rpm and see if you can feel better mid range. If so try getting it all in by 3500 rpm. Listen carefully for pinging when you give it full throttle at...
Forum: Gearbox, Transaxle, Differential & Propshaft   07-09-2019, 05:45 PM
Replies: 5
Views: 160
Posted By alfaparticle
I got a ride in a 69 Berlina last week with a 4.3...

I got a ride in a 69 Berlina last week with a 4.3 axle.
Forum: Alfetta & GTV6 (1972-1986)   07-08-2019, 08:18 PM
Replies: 52
Views: 1,302
Posted By alfaparticle
I would drive the car hard, preferably on a track...

I would drive the car hard, preferably on a track and then determine if you want to to loosen up the rear with a heavier bar. Milano Verde's have LSD which reduces oversteer.
Forum: Alfetta & GTV6 (1972-1986)   07-08-2019, 05:35 PM
Replies: 52
Views: 1,302
Posted By alfaparticle
Some people fit the lighter Alfetta rear bar to...

Some people fit the lighter Alfetta rear bar to GTV6's.
Forum: Spider - 105 & 115 Series (1966-1994)   07-08-2019, 02:59 PM
Replies: 3
  S4 Coil
Views: 139
Posted By alfaparticle
It could be that current initially arced across a...

It could be that current initially arced across a break in the winding and eroded the ends of the wires until the gap was too large.
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