matt24680 Posted September 2, 2010 Posted September 2, 2010 hi there i have a manta gte hatch 1984 and i will be stripping it down and rebuilding it and i would like to have a fairly powerfull engine my question is should i buy a different engine and do a conversion (not red top) or rebuild the existing 2.0 8v one port and polish ,rebore ect? whats the easiest conversion to do and price wise whats the cheapest? thanks:) Quote
lamchop77 Posted September 3, 2010 Posted September 3, 2010 hi there i have a manta gte hatch 1984 and i will be stripping it down and rebuilding it and i would like to have a fairly powerfull engine my question is should i buy a different engine and do a conversion (not red top) or rebuild the existing 2.0 8v one port and polish ,rebore ect? whats the easiest conversion to do and price wise whats the cheapest? thanks:) Same old question to ask, what sort of power are you looking for and what is your budget, then we'll see what we come up with! cheers Chris Quote
upk Posted September 3, 2010 Posted September 3, 2010 this is the subject of many a debate! For a small members fee you guys could have access to vast amount of information on this topic!! worth every penny Quote
matt24680 Posted September 3, 2010 Author Posted September 3, 2010 hi there i sent my membership fee a while ago nd got a magazine nd stuff??i am looking for over 150bhp and wudnt like to spend more than £700 Quote
mantadoc Posted September 3, 2010 Posted September 3, 2010 hi there i have a manta gte hatch 1984 and i will be stripping it down and rebuilding it and i would like to have a fairly powerfull engine my question is should i buy a different engine and do a conversion (not red top) or rebuild the existing 2.0 8v one port and polish ,rebore ect? whats the easiest conversion to do and price wise whats the cheapest? thanks:) The simplest non-Red Top would be a CAV SRI 130 motor, or if using a 1.8 CAV SRI or Kadett D / Astra MK1 1.8 as injection is nearly identical on those. 1.8 Gearbox / sump / mounts or improvised equivalent. All the expensive 1.8 Manta conversion parts but not the benefit of the full Red Top Basically if going family II then Red Top makes sense, but if keeping standard injection I don't think any old Red Top with more than 22 years under it's belt will likely be making as much power as a 136BHP X20XEV that should com wrapped in a Vectra for £250 or so. Still needs all the 1.8 bits However, the cheapest 170 / 180 BHP would be a 12V 3.0 lump which should take about 2 days and £200 including engine and reuse the existing cheap GTE gearbox. Getting harder to find a good one. Some people will say go 24V three litre. More costly to buy and fit due to flywheel / alloy sump. More complex due to Motronic (Jetronic of old 3.0 easily plugs into Manta) Worth the extra 40BHP? Maybe. Quote
matt24680 Posted September 3, 2010 Author Posted September 3, 2010 hi there thanks for the reply it really helps i like the thought of 3.0 12v will that need modified engine mounts?and can i use existing diff? Quote
mantadoc Posted September 3, 2010 Posted September 3, 2010 If you can get into the members section http://forums.mantaclub.org/topic/15481-straight-six-into-cavalier/page__p__102560__fromsearch__1#entry102560 And if you can't http://forums.mantaclub.org/topic/21486-manta-c30se-conversion-cornwall/ Quote
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