Recent content by dd1990
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Let’s talk PCV systems.
On stock engine one valve cover has pcv with vacuum and the other is fresh air from air cleaner or breather. If you do two vacuum pcv's, too much vacuum in the crank case can suck in the engines gaskets and cause leaks. Two breathers (no vacuum) and you might build up to much pressure in crank...- dd1990
- Post #33
- Forum: Engine & Performance
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Catalytic Converter
It was a Magnaflow CARB certified cat. Here link. https://www.magnaflow.com/products/3391476-magnaflow-california-grade-carb-compliant-direct-fit-catalytic-converter-3391476- dd1990
- Post #7
- Forum: Engine & Performance
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Catalytic Converter
Those old pancake style cats were restrictive when new, I definitely felt a horsepower bump when I switched to a modern honeycomb cat.- dd1990
- Post #4
- Forum: Engine & Performance
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Cutting hole in floor to replace fuel sender
use sheet metal nibbler to reduce the potential of sparks when cutting the hole, Mericks garage on youtube has a good video on this.- dd1990
- Post #21
- Forum: Carb Fuel Systems
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Looking for the GMC grill emblem for a 1990 Suburban that fits the grill I have
No one sells it as of yet.- dd1990
- Post #2
- Forum: Paint and Body
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TBI coil pigtail question
Yes that looks like the wire to connect to for a tach.- dd1990
- Post #2
- Forum: TBI & EFI Conversions
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Comp Cams Break in
I would agree with you but people are wiping lobes on mild cams, and even roller cams have their issues. Quality control, IMO, is the problem, especially with lifters. Have to stick to good company like Howard's or Crower- dd1990
- Post #7
- Forum: Tech Discussion
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To Tint or Not to Tint
Don't know your state laws but don't give cops a reason. I will tint the back window(s) but fronts are asking for a pull over in the Peoples Republic of California.- dd1990
- Post #9
- Forum: Glass & Mirrors
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Comp Cams Break in
No one used break in springs in the past, radical cams are not knew, they've been around for decades, I believe the problem today is quality control on materials and fitment.- dd1990
- Post #2
- Forum: Tech Discussion
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Do throttle body or carb spacers actually help?
It may have increased mpg, although 5mpg seems like a stretch. I have never measured mpg before, I'm around 15-16mpg on my suburban but that also after a good tune and tbi rebuild. The salad bowl can be easily felt with how the engine revs more freely.- dd1990
- Post #24
- Forum: Engine & Performance
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Do throttle body or carb spacers actually help?
Ive used spacer didn't notice anything. Spacers can be useful to reduce heat soak but you need a phenol or wood type spacer. The best TBI mod where I actually felt a difference was the salad bowl under air cleaner.- dd1990
- Post #4
- Forum: Engine & Performance
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Digital dashes
Whatever aftermarket gauges you get use the New Vinatge USA Snap-adapt so you don't have to cut up the harness, makes it more plug and play. I used the snap adapt with Dakota Digital VHX gauges. -
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New R134a system - compressor kaput (what to replace)?
Ac-delco compressors tend to be the best. That being I had a new R4 compressor from acdelco that leaked so I went with a Sanden and never looked back. Also keep in mind the new parallel condenser is smaller so you will have to move all the mounting brackets inward. -
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Too high Hydrocarbon on emission tests-Help
If you have the original pancake cat that may be your problem, those cats are junk the beads have to replaced. A new cat with a the honeycomb design flows more and burns off excess fuel emission way better. You don't need air or air injection to run a cat, my suburban has a cat but no air or...- dd1990
- Post #13
- Forum: Carb Fuel Systems
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Proper size AC condenser
if your running r134 you want to use the new smaller parallel flow condenser. Way better than the old tube style. For mounting you just need to move the condenser mounts inward and cut out some of the rubber isolators.
