First timer build suggestions NEW PARTS!!! NEED ADVICE!

Brian_e · Last edited by Brian_e on Wed Sep 02, 2009 6:34 am; edited 1 time in total

I just aquired a 1600 DP long block with an Engle 120 came, crappy port job, and swivel foot adjusters. I am wanting to use this long block to try my hand at aircooled engine work. I would like to go through this engine, and build it up a little while I keep the 1600 running in my sedan.

I have a few sets of DP heads, and I have been doing tons of porting research. I would really like to try it myself. I also have a new set of 87.5's I would like to use (I know they suck but I have them and they are new). I realize I am not going to get 100hp, and I realize it might run a warm (I am in South Dakota). I don't even need this thing to last me 50,000 miles. I just want to have a little fun for not much $$. It will never see a race track, but I do drive it like I am 16. I just want to try this engine out before I build a real 1915 the correct way.

Here is a list of parts I have, and I would like to see what you guys would recommend for a cam, compression, and which of the parts I have acquired to use. I know the 120 cam is too much, and I don't mind spending a little on a new cam if it will help.

Clean AH case, stock bore,
stock crank and rods, newer rebuild
new 87.5 P&C
newer Kadron 40's
Bugpack Hide away header and muffler
13lb flywheel
New 1.4 rockers
CM push rods
new stainless stock size valves and guides
high rev single springs, and solid shafts.
Engle 120 cam

I was thinking of maybe a 110 cam, and 8.5 with the stock ported heads. Should I use the rockers, or a different cam?? Any help would be appreciated.

Thanks Brian

DarthWeber · Posted: Thu Jul 30, 2009 11:18 pm Post subject:

You must mean you have 87mm P/Cs, not 87.5, this will give you 1641cc. If you want to run the 1.4 rockers use a stock cam. If you want to run a bit more cam I'd use an Engle 100 with stock 1.1:1 rockers. Since you'll be using the stock non-counterweighted crank this will limit your revs to 5k if you want to get any kind of mileage out of the motor. If you had a counterweighted crank to put in there I'd go for the E-110 so you could use the extended rev range it offers. No matter what cam you use any port work you do on the heads will be a benefit along with a good 3 angle valve job. Keep the compression ratio stock (7.5:1) if you go with the stock cam or 8:1 with the 100 or 110 cams. Have your rotating assembly balanced. I'd have the case tapped for full flow and run a 1.5 qt sump too.

krusher · Posted: Fri Jul 31, 2009 1:07 am Post subject:

I would say no bigger than a engle 100 also.
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madmike · Posted: Fri Jul 31, 2009 7:07 am Post subject:

Sounds like you don't want to split the case to remove that cam to me?? If so Confused

Port some heads!!!,trade the K-Duds off for some real carbs like 40 IDF's Cool

and and get some stock ratio rockers and Hd springs on those heads, a W120 likes higher CR too If it's just a play motor like I'm thinking 9:1-10:1 good fuel or 50/50 mix race gas Cool

Should scoot down the road purdy good Laughing

_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

Brian_e · Posted: Fri Jul 31, 2009 7:27 am Post subject:

Brian_e · Posted: Fri Jul 31, 2009 7:32 am Post subject:

madmike · Posted: Sat Aug 01, 2009 6:47 am Post subject:

Chokes??? we don't need no stinking Chokes Laughing

Brian, i live on the Polar equator Cool

, since u have the K-duds keep them but if you get the opportunity to swap for 40idf's you won't be sorry, Gee one throat for each cyl. what a great idea Shocked

as for the cam issue yea a W110 will out perform a stocker w/1;4's since it's got a longer duration, do balance it ,the bearing will like it and your ass on loooooong SD drives Laughing

keep the W120 for the 1915 or 2332 Cool

Madmike
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

Brian_e · Posted: Sat Aug 01, 2009 9:37 pm Post subject:

I took the heads off today, and found they are 041 heads with 32mm exh valves and 40mm intakes. They don't appear to be cracked. The only thing that concerns me is the ports look huge compared to the other DP heads I have with smaller valves. I am worried the previous builder just hogged the ports out.

Should I stick with the stock heads ported with a 3 angle, or use these 041 heads with questionable porting???

Is it possible to use 1.4's with a 100 or 110 engle cam??

madmike · Posted: Sun Aug 02, 2009 6:02 am Post subject:

1:4's are not for W120, W110 or w100 cams, use only 1:25's But they can be used on an FK8 Cool

_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

vwracerdave · Posted: Sun Aug 02, 2009 6:59 am Post subject:

With a stock non-counterweight crank you are limited to 4500 RPM. Any more will pound out the bearing journals. With that limitation there is no reason to go larger then a W-100 cam. The W-110 pulls to 5500 RPM and the W-120 pulls to 5800 RPM. Both are above the 4500 limitation of the stock Non-CW crank. The Engle W series cams are ground for stock 1.1 or 1.25 rockers only. It would be much cheaper to get a W-100 cam and stock rockers then to use a stock cam and your 1.4 rockers then have to buy new pushrods cut to the correct lenght.

Throw a W-100 cam in, Keep the compression 7.0-7.5, port whatever set of stock heads you feel is best, tune the Kads and rock on.
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Brian_e · Posted: Sun Aug 02, 2009 7:05 am Post subject:

krusher · Posted: Sun Aug 02, 2009 7:22 am Post subject:

ALB · Posted: Sun Aug 02, 2009 7:31 am Post subject:

Yes, the FK8 will be too much for this motor. Read again what vwracerdave said in his last post, and think of this; if you take longer than expected to build your 1915 cc (or? these things have a habit of growing- a stroker crank is only xx more dollars but now i have to save a little more!) dream efi motor or after it has some miles on it and it needs to come out for some maintenance, having a dependable runner that will run longer without problems as the big motor build took longer than expected or it being under the bench and can be installed at a moment's notice would be very handy. The W100 will provide more than enough go for now and be reliable if the snot isn't driven out of it ALL THE TIME. I would keep the compression around 7.5-7.8.
Just my 2 1/2 cents (I'm Canadian, eh). Al
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On a lifelong mission to prove (much to my wife's dismay) that Immaturity is Forever!!

Brian_e · Posted: Sun Aug 02, 2009 7:47 am Post subject:

Last question.

What are the down sides to bumping the compression little more?? I was originally thinking 8.0-8.5. I know it will run a little warmer, and require better gas, but what else. Will the smaller cams work with the higher compression?? I thought compression=HP and fun. Would it be a bad thing to run a little higher comp. in trade for a little less life?? Remember this is my learning/play motor.

Thanks everyone for helping out a learning newbie.

Brian

DarthWeber · Posted: Sun Aug 02, 2009 11:10 am Post subject:

madmike · Posted: Mon Aug 03, 2009 5:24 am Post subject:

I meant to say use the 1:4's & FK8 on the big motor down the road Laughing

The latest Combo will work for u,just use good fuel !! 'its' a play motor!! You can always lower the CR if you must.Back in the day of My 1/2 1600 Score rules buggy racing we had 10:1 with these Cams and single carbs Ran the $hit out of them for hours on end and never a problem with them Cool

_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

ALB · Posted: Mon Aug 03, 2009 9:21 am Post subject:

Brian_e · Posted: Mon Aug 03, 2009 9:50 am Post subject:

OK, I am gonna order the cam today.

100 or 110???

Cheap bolt-on 1.25's or not?? I already have cut to length rods, and two of the stock rods have broken tips.

Compression will be 8.0, stock valve ported heads.

madmike · Posted: Tue Aug 04, 2009 5:38 am Post subject:

I did say good fuel Confused

_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

Guack007 · Posted: Wed Aug 05, 2009 10:39 am Post subject:

I would say go with the W-100 and stock rockers since your crank wont let you rev past 4500RPM anyways


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