Map for alfa boxer 1.7 16v

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Alfawiz
Posts: 6
Joined: Thu Sep 03, 2009 9:56 pm

Map for alfa boxer 1.7 16v

Post by Alfawiz »

Hi, Having just fitted a megajolt to my '69 Beetle which is fiited with an Alfa boxer 1.7 16v engine,got it to run OK but just need a better map.Anybody got one or any ideas as to what I need?

NITROPIXIE
Posts: 704
Joined: Sun Sep 07, 2008 1:54 pm
Location: Fareham, GB

Post by NITROPIXIE »

A nice chap with some experience and/or a rolling road would be the most ideal solution. There aren't many alfa boxer engines on here i'm afraid.

The basic Map should be sufficent and safe to drive with the mean time.
1310 A-series Mini, lightened and built myself. V4 board and loving it

Rasputin22 - The Mini Forum
Rasputin22 - MK1 Golf Forum

Megajolt repair for the UK available

DannyP
Posts: 417
Joined: Sun Apr 09, 2006 3:48 pm

Post by DannyP »

I think there is a UK-based 550 Spyder website. Lots of British Spyder guys use alfasud engines, perhaps they can help you with a starter ignition curve to make your map from?

alfa boxer
Posts: 47
Joined: Tue Jun 05, 2007 2:50 pm
Location: LEEDS UK

Post by alfa boxer »

I intend to hopefully have my map finalised next week i am runing tps at the end of the throttle shaft.are you using tps? i will post a screen shot of the map when finished.
Attachments
finished asembly.jpg
finished asembly.jpg (49.63 KiB) Viewed 25879 times

Alfawiz
Posts: 6
Joined: Thu Sep 03, 2009 9:56 pm

Post by Alfawiz »

Yes I put mine on the end of one carb,it was easier to fit then I thought,I just need to tighten the pulley up a bit more bcos as you know they dont have any location! & it has worked loose once.I'll add some pics on here when I figure how to.Cheers,Pete

Rich550
Posts: 21
Joined: Wed May 13, 2009 7:59 pm
Location: Leicestershire

Post by Rich550 »

I'm working on a map for my alfa 33 1.7 8 valve, they're probably quite similar.

I found a graph of the ignition curve for the early Alfasud - probably 1300 (printed in 1975!). Although they state 8'@idle - 22'@2000rpm and 36'@4500 this graph looks really low - can anyone explain this? (I'll try and attach a scan)
Attachments
alfa workshop manual ignition.JPG
alfa workshop manual ignition.JPG (214.73 KiB) Viewed 25783 times
Martin & Walker Porsche 550 Spyder replica with Alfa 1.7 8valve boxer engine. MJLJ V4 / TPS

Alfawiz
Posts: 6
Joined: Thu Sep 03, 2009 9:56 pm

Post by Alfawiz »

Ive now sorted the carb jetting out a bit as it was running lean at higher revs,I drilled the 135 mains out to 160 then 180 much better,she really pulls now,the CO's around 3-4 % when pulling hard in 3rd And the HC's are around 220 at idea which is great!
Alfa Boxer hows the map going? Mines not pinking but I know theys still more to gain on the ignition side as well.
Attachments
Heres the crank pulley
Heres the crank pulley
pulley on engine.JPG (78.24 KiB) Viewed 25772 times
TPS on carb spindle
TPS on carb spindle
TPS on engine.JPG (75.21 KiB) Viewed 25772 times
Alfa engine.JPG
Alfa engine.JPG (77.18 KiB) Viewed 25772 times

alfa boxer
Posts: 47
Joined: Tue Jun 05, 2007 2:50 pm
Location: LEEDS UK

map

Post by alfa boxer »

hope this helps
Attachments
Image024.jpg
Image024.jpg (228.01 KiB) Viewed 25758 times

Alfawiz
Posts: 6
Joined: Thu Sep 03, 2009 9:56 pm

Post by Alfawiz »

Cheers mate,I will put that in,I just need to open the jets out a tad more as shes still running lean at the mid to top end

alfa boxer
Posts: 47
Joined: Tue Jun 05, 2007 2:50 pm
Location: LEEDS UK

jets

Post by alfa boxer »

I am using .45 idle jets 140mains and 200 air correcters with 32 mm chokes

Alfawiz
Posts: 6
Joined: Thu Sep 03, 2009 9:56 pm

Post by Alfawiz »

Mine are 52 idles 180 mains 220 AC & 30mm chokes(I Think) in 36 IDFS It did have 135 mains but was running too lean,it still is a bit.How is yours running? have you had it dynoed yet?

alfa boxer
Posts: 47
Joined: Tue Jun 05, 2007 2:50 pm
Location: LEEDS UK

jets

Post by alfa boxer »

I have a device that tells u exactly what the mixture is at whatever load and revs your doing on the open road and you can ajust the map to suit. car runs really really well :D although i need to build the aux input ,for cold starts this adds 3deg to the first three bins untill up to a presett temp.

DannyP
Posts: 417
Joined: Sun Apr 09, 2006 3:48 pm

Post by DannyP »


alfa boxer
Posts: 47
Joined: Tue Jun 05, 2007 2:50 pm
Location: LEEDS UK

afr

Post by alfa boxer »


NITROPIXIE
Posts: 704
Joined: Sun Sep 07, 2008 1:54 pm
Location: Fareham, GB

Post by NITROPIXIE »

Being into my DIY stuf i got myself a NAW OEM from http://14point7.com/ but i haven't got myself a sensor yet so its not plumbed in. Will do oneday.
1310 A-series Mini, lightened and built myself. V4 board and loving it

Rasputin22 - The Mini Forum
Rasputin22 - MK1 Golf Forum

Megajolt repair for the UK available

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