alistairolsen
12-12-05, 11:32 AM
Been waiting to put this up for a while. The car was meant to be RRd last week, but as dastek are a bunch of cunts, :roll: its output is as yet unconfirmed.
After much deliberation about carbs etc, Aragorn convinced me that spi was the way forward. I already had a good 14nv bottom end in the Sr, with a fourbranch, and a standard top end. Id also bought a c14se head cheap with a mind to fitting a webber carb to it.
This left me to source a suitable manifold, so it was off to the dealers for some gaskkets. It turns out that the 1300sr manifold is a direct fit for the 1499 head once you fill the bottoms of the runners. It opens out sharply from a round tract to the cathedral shape where it meets the head. I chose to fill this with chemical metal which claims to be good for petrol and 160 degrees, but we shall wait and see. For anyone less confident, welding is an option :?
The head was stripped and rebuilt, and chamber volumes measured. I was aiming for 10:1, but due to time constraints couldnt get it skimmed, so it went on with as std giving 9.54:1 once the valves were relapped and the manifold matched to the head, an adaptor plate was made to mount the 1800 cav TB. I have a diagram of this if anyone is interested.
The whole shebang was bolted together, and then the engine was stripped and the new top end fitted. A heated lambda sensor mounted into the fourbranch and wired to the fuel pump relay.
After some mucking around to repair some loom mods id made in the past, a dodgy bit of cable, a mashed ignitioin switch and a seized starter it ran, at 3k!
The high idle was the resut of an air leak, and after that was sorted it fell to a nice idle at just below 1k.
The result: The car is mental to drive, significantly quicker than my mates sri in the same trim, spins thru second in the wet or on any lock. I pulls cleanly to the rev limiter with no flat spots, the limiter in fourth is effortless and it still pulls well in fifth. Best guesstimate is aroun 95hp, but id be hppy with high 80s.
The total cost of this has been minimal, 15 quid for the head, 10 for the TB, 15 for thmanifold, a headset and some time.
The ecu is giving me code 44 for lean running if you give it stick for long enough, so Im trying to get an injector from a 1600 spi astra as I feel the 1800 will be overkill.
Will post up power figures as soon as I have them, sorry about the essay and I hope this helps a few folk
PS, I made an average of about 35mpg the other night over 90 miles of b roads, combination of traffic and flat to the floor. The SR engine used to average just under 30!!
After much deliberation about carbs etc, Aragorn convinced me that spi was the way forward. I already had a good 14nv bottom end in the Sr, with a fourbranch, and a standard top end. Id also bought a c14se head cheap with a mind to fitting a webber carb to it.
This left me to source a suitable manifold, so it was off to the dealers for some gaskkets. It turns out that the 1300sr manifold is a direct fit for the 1499 head once you fill the bottoms of the runners. It opens out sharply from a round tract to the cathedral shape where it meets the head. I chose to fill this with chemical metal which claims to be good for petrol and 160 degrees, but we shall wait and see. For anyone less confident, welding is an option :?
The head was stripped and rebuilt, and chamber volumes measured. I was aiming for 10:1, but due to time constraints couldnt get it skimmed, so it went on with as std giving 9.54:1 once the valves were relapped and the manifold matched to the head, an adaptor plate was made to mount the 1800 cav TB. I have a diagram of this if anyone is interested.
The whole shebang was bolted together, and then the engine was stripped and the new top end fitted. A heated lambda sensor mounted into the fourbranch and wired to the fuel pump relay.
After some mucking around to repair some loom mods id made in the past, a dodgy bit of cable, a mashed ignitioin switch and a seized starter it ran, at 3k!
The high idle was the resut of an air leak, and after that was sorted it fell to a nice idle at just below 1k.
The result: The car is mental to drive, significantly quicker than my mates sri in the same trim, spins thru second in the wet or on any lock. I pulls cleanly to the rev limiter with no flat spots, the limiter in fourth is effortless and it still pulls well in fifth. Best guesstimate is aroun 95hp, but id be hppy with high 80s.
The total cost of this has been minimal, 15 quid for the head, 10 for the TB, 15 for thmanifold, a headset and some time.
The ecu is giving me code 44 for lean running if you give it stick for long enough, so Im trying to get an injector from a 1600 spi astra as I feel the 1800 will be overkill.
Will post up power figures as soon as I have them, sorry about the essay and I hope this helps a few folk
PS, I made an average of about 35mpg the other night over 90 miles of b roads, combination of traffic and flat to the floor. The SR engine used to average just under 30!!