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Gil-bug
Samba Member
Joined: February 17, 2015
Posts: 90
Location: Luxembourg
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 Posted: Mon Feb 17, 2020 5:14 am Post subject: 1300F to 1776 single port budget build? Is it worth it? |
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Hello, i am looking to build a stock looking 1776 single port and single carb engine for my split bus. I have a 1300 F lying around here. I don΄t want to have a high speed engine. I just want to be able to flow with the traffic in town and uphill. Budget 1000 to 1500 bucks.
So here is the idea:
1) Bore up the 4 big holes on the case to allow the install of 1776 cylinders and pistons.
2) Bore up the cylinder heads to 98 mm
3) Buy the 1776 piston and cyl. kit with engine gasket kit
4) Reassemble with everything else stock (exhaust, cooling, 30 pict2 carb)
So ist my proect realistic or do i have to do other mods? should i better let it be?
Thanks for your opinion  |
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spencerfvee
Samba Member
Joined: August 19, 2004
Posts: 3071
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| Posted: Mon Feb 17, 2020 5:58 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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| Gil-bug wrote: |
Hello, i am looking to build a stock looking 1776 single port and single carb engine for my split bus. I have a 1300 F lying around here. I don΄t want to have a high speed engine. I just want to be able to flow with the traffic in town and uphill. Budget 1000 to 1500 bucks.
So here is the idea:
1) Bore up the 4 big holes on the case to allow the install of 1776 cylinders and pistons.
2) Bore up the cylinder heads to 98 mm
3) Buy the 1776 piston and cyl. kit with engine gasket kit
4) Reassemble with everything else stock (exhaust, cooling, 30 pict2 carb)
So ist my proect realistic or do i have to do other mods? should i better let it be?
Thanks for your opinion |
...
..sounds like you want to keep it simple. it should run just fine . since you have the case apart you should think about new lifters a new cam a engle cheater cam new oil pump and a valve job and new valve springs and rejet the carb with bigger main jets if you have the money to do so . good luck spencerfvee |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31379
Location: Hot Arizona
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| Posted: Mon Feb 17, 2020 7:51 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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Should be fine, make sure to have enough venting in the bus for larger engine, cooling.
Consider updating to a doghouse shroud and cooler. Bigger engines give off more heat.
_________________
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FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
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| Posted: Mon Feb 17, 2020 8:04 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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If you're re-using those high-mileage heads, change the exhaust valves. Please don't ask me why I'm saying that....
And do what the others said, esp. the 2280 cam, new lifters, and the doghouse....like every project, this is snowballing a little bit, but that's par for the course. |
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[email protected]
Samba Member
Joined: August 15, 2002
Posts: 4394
Location: Brew City
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| Posted: Mon Feb 17, 2020 8:42 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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| Cusser wrote: |
Should be fine, make sure to have enough venting in the bus for larger engine, cooling.
Consider updating to a doghouse shroud and cooler. Bigger engines give off more heat. |
There are very few things I say about engines that MUST be done but if you go to a 1776, you MUST upgrade to a doghouse oil cooler, wider fan and shroud. Ask me how I know for sure....
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15309
Location: Deep in the 405
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| Posted: Mon Feb 17, 2020 8:47 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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With SP heads and a 30 PIC2 I wouldn't go any larger than a 1679cc with 88mm pistons.
A stock carb is not even big enough for a stock engine. You will get far better results leaving it a 1600 and adding dual carbs.
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vwinnovator
Samba Member
Joined: July 11, 2005
Posts: 1555
Location: Still doing it in the back of your VW
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| Posted: Mon Feb 17, 2020 9:31 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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cut of the carb flange from the single port manifold and weld on one from a dual port.
Run a 34 pict 3 and it'll be fine. |
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Brian
Samba Moderator
Joined: May 28, 2012
Posts: 8340
Location: Oceanside
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| Posted: Mon Feb 17, 2020 12:29 pm Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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| vwinnovator wrote: |
cut of the carb flange from the single port manifold and weld on one from a dual port.
Run a 34 pict 3 and it'll be fine. |
Or SP end castings with a DP center section. Dont use normal DP manifold boots and use radiator hose to seal it. Or just do a 1600 with a 30pict
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hobbybob517
Samba Member
Joined: June 02, 2011
Posts: 1194
Location: Netherlands
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| Posted: Mon Feb 17, 2020 2:04 pm Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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The 1300 F has tiny oil passages, and a tiny oil pick up tube,
i would at least go and look for a AB case
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3 million rpm? Well there's your problem! No wonder it blew up! |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7219
Location: Videbaek Denmark
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| Posted: Mon Feb 17, 2020 3:13 pm Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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| Gil-bug wrote: |
Hello, i am looking to build a stock looking 1776 single port and single carb engine for my split bus. I have a 1300 F lying around here. I don΄t want to have a high speed engine. I just want to be able to flow with the traffic in town and uphill. Budget 1000 to 1500 bucks.
So here is the idea:
1) Bore up the 4 big holes on the case to allow the install of 1776 cylinders and pistons.
2) Bore up the cylinder heads to 98 mm
3) Buy the 1776 piston and cyl. kit with engine gasket kit
4) Reassemble with everything else stock (exhaust, cooling, 30 pict2 carb)
So ist my proect realistic or do i have to do other mods? should i better let it be?
Thanks for your opinion |
Hello.
-Worth it or not
depends on the eyes looing at it. The engine will get a behaviure like 30hp (36us) You will get maybe 55hp out of it at about 3300rpm and it will fall on its face very soon after that. It will pull decent torque in the idle to 2600ish rpm. Nothing fancy.
So you decide if it is worth it.
If you ask me, I would say no.
I am currently building a 1776 sgl port on a sgl relief case, for a bus that has to look just about stock. Everything from enlarging the oil galley to seriusly rework 1600 bus heads, different cam, dual port intake w modified empi end castings and a gutted stock exhaust. Its a comprehensive job to achieve a solid 70hp and approx 140nm torque. |
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FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
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| Posted: Tue Feb 18, 2020 3:50 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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| Alstrup wrote: |
| Gil-bug wrote: |
Hello, i am looking to build a stock looking 1776 single port and single carb engine for my split bus. I have a 1300 F lying around here. I don΄t want to have a high speed engine. I just want to be able to flow with the traffic in town and uphill. Budget 1000 to 1500 bucks.
So here is the idea:
1) Bore up the 4 big holes on the case to allow the install of 1776 cylinders and pistons.
2) Bore up the cylinder heads to 98 mm
3) Buy the 1776 piston and cyl. kit with engine gasket kit
4) Reassemble with everything else stock (exhaust, cooling, 30 pict2 carb)
So ist my proect realistic or do i have to do other mods? should i better let it be?
Thanks for your opinion |
Hello.
-Worth it or not
depends on the eyes looing at it. The engine will get a behaviure like 30hp (36us) You will get maybe 55hp out of it at about 3300rpm and it will fall on its face very soon after that. It will pull decent torque in the idle to 2600ish rpm. Nothing fancy.
So you decide if it is worth it.
If you ask me, I would say no.
I am currently building a 1776 sgl port on a sgl relief case, for a bus that has to look just about stock. Everything from enlarging the oil galley to seriusly rework 1600 bus heads, different cam, dual port intake w modified empi end castings and a gutted stock exhaust. Its a comprehensive job to achieve a solid 70hp and approx 140nm torque. |
How much do those extra 15hp cost? |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7219
Location: Videbaek Denmark
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| Posted: Tue Feb 18, 2020 4:16 am Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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On top of a stock 1600 rebuild, something like 1300 extra. But they do run very nice.
I have converted some 2 liter Limbach sgl port engines too. That΄s an even bigger job to make them run well and make power The best of them typically end up around 85 - 90 hp and 165 Nm torque, with a slightly rough, but steady idle.
I have built one milder version that runs as smooth as a stock sgl port, but still pulls 80 hp and 155 Nm torque. Completely stock look apart from the more "modern" intake manifold. |
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jeffrey8164 
Samba Member
Joined: January 06, 2018
Posts: 3819
Location: Georgia
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| Posted: Tue Feb 18, 2020 12:21 pm Post subject: Re: 1300F to 1776 single port budget build? Is it worth it? |
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If youre asking me, I say no, its not worth it.
If it needs rebuilding then just rebuild it stock and enjoy the original character.
If you really want more power, then save some more money. There is much more to buy than some jugs, machine work and bearings.
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