2.8 Rolling road report
Moderators: drummerboytom, MdR
2.8 Rolling road report
Hi to All, not been on for a while. Been busy during the winter months, I decided to have a go at building a new engine for the car.
Previously converted to a 2.2T which was great fun. But always thought of building my own. So went down the 2.8 twinplug path. Used the same bb headers and exhaust from the previous motor and decided to use the zeniths as well, one reason was to help with the budget and one reason to see if it was possible?
So rolling road yesterday. The second of 2 and hopefully the last for a while .....228hp and 275 Nm worth of Torque!! Can’t wait for the weekend ))))
Previously converted to a 2.2T which was great fun. But always thought of building my own. So went down the 2.8 twinplug path. Used the same bb headers and exhaust from the previous motor and decided to use the zeniths as well, one reason was to help with the budget and one reason to see if it was possible?
So rolling road yesterday. The second of 2 and hopefully the last for a while .....228hp and 275 Nm worth of Torque!! Can’t wait for the weekend ))))
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Re: 2.8 Rolling road report
Fantastic, I bet that's fun.
Re: 2.8 Rolling road report
Well this weekend you could not get me out of the car !!! )))))defianty wrote:Fantastic, I bet that's fun.
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Re: 2.8 Rolling road report
I am envious! Great figures = great fun!
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Re: 2.8 Rolling road report
Impressive figures. What’s the engine spec?
2.8 Rolling road report
Started as a 1974 2.7 cid.Gary71 wrote:Impressive figures. What’s the engine spec?
It’s now based on a 2.8 RS kind of setup including twinplug.
I can dig out the cam, valve and compression info if you want?
Re jetted Zeniths, and ignition is Marelli look alike with 123 ignition inners. SS BB Headers and SS Bursch exhaust.
I ran it for 2 months or so as single plug. Hence the first figures on the report.
When I had all the original engine machining work done I had the heads drilled anyway. So it was always on the radar.
So bit the bullet and here we are.
Pretty looking 914 but now goes like stink )))))
Regards Mark.
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Re: 2.8 Rolling road report
Ahhh, pictures just popped-up!
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
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Re: 2.8 Rolling road report
Excellent!
I'm not sure I'm reading the graph correctly - as I understand it you've got figures that compare same engine, first with single plug setup, then with twin plugs? if so a really nice way to clarify the differences on power and torque - can you confirm what they were?
Also, please could you give a little more detail on the twin plug ignition - distributor and how you're firing both setts of plugs etc? This is a medium/longer terms project aspiration for me.
Many thanks
I'm not sure I'm reading the graph correctly - as I understand it you've got figures that compare same engine, first with single plug setup, then with twin plugs? if so a really nice way to clarify the differences on power and torque - can you confirm what they were?
Also, please could you give a little more detail on the twin plug ignition - distributor and how you're firing both setts of plugs etc? This is a medium/longer terms project aspiration for me.
Many thanks
Magnus
1972 3.2 RS lightweight. Still a bit scary...
1987 3.2 Carrera. Sold..
1972 Alfa 1750 GTV. Sold...
1971 911E in Silver. So lovely, sold..
1971 911S. sold....
1972 BMW CSL. Stupidly sold...
1968 Land Rover SIIa SWB..rusted in half...
1972 3.2 RS lightweight. Still a bit scary...
1987 3.2 Carrera. Sold..
1972 Alfa 1750 GTV. Sold...
1971 911E in Silver. So lovely, sold..
1971 911S. sold....
1972 BMW CSL. Stupidly sold...
1968 Land Rover SIIa SWB..rusted in half...
Re: 2.8 Rolling road report
Hi Magnum, yes the red graph is with the single plug set up with a 123 Distributor.Magnum wrote:Excellent!
I'm not sure I'm reading the graph correctly - as I understand it you've got figures that compare same engine, first with single plug setup, then with twin plugs? if so a really nice way to clarify the differences on power and torque - can you confirm what they were?
Also, please could you give a little more detail on the twin plug ignition - distributor and how you're firing both setts of plugs etc? This is a medium/longer terms project aspiration for me.
Many thanks
Blue line is from a couple of weeks ago after converting to twin plug. I used Permatune Boxes and coils, plus Marelli reproduction with 123 inners which is Bluetooth which makes it a bit easier when tuning. Obviously only a nice to have.
Hope this helps?
Best regards Mark